I bought a 1979 Motobecane Mobylette 50V a few days ago and discovered this series the next day. I just finished episode 21. These videos are a fantastic resource and have already helped me in just the last couple days. Great job, and thank you!! And yes. the music is great and fits these videos really well.
Wow.... I just want to say thank you. You did an incredible job on this series. I binged all the videos over the course of two days and I feel like I somehow know you even though we've never met. I bought a 76' Motobécane Moblyette 50V from a guy in St. Augustine a few weeks ago and i'm in the process of restoring it. Thank you for documenting this entire process so well... I appreciate it more than you know!
This series brought me back. My first moped was a yellow Moto with the variator. I bought it used from a friend sometime around 1978 - 80. I had a lot of fun with that thing. Larter I had a Puch Maxi and then another Puch that had a horizontal fuel tank and a two speed auto transmission. Once I was old enough to get a motorcycle license, I traded that last Puch for an old Honda 350... lol Thanks for reminding me of the great fun I had as a kid with mopeds!
all hail dave and his shit!! i bought a 40T at a flea market in france for 60 euro, didnt run, seized up, watched all your videos, learned a ton and i love the thing now.. all stock so far.. time go deeper.. thank you Dave, and the tunes! yeah!
Hey David, I just got into the moped world a little over a year ago and love your videos, I just bought a 1979 Motobecane Moby 50V and love it. Watching this video shows me how they can be super fun as well being a pain in the butt. Thanks again my dude!
Great videos. Had me smiling and felt the excitement going down the other side of that bridge. Built my Av7 with a variator and 15mm Dellorto. Next few months I will be fitting the Airsal. Thanks again.
Good luck with your build. What is the gearing on your Moby? I’m thinking about changing mine before the summer so my top speed decreases and my acceleration increases.
Your Videos are great David, I love your enthusiasm and awesome sense of humour! 66 mph is pretty darn fast! Looking forward to your next project and more great laughs!
I’ve been watching lots of your videos and they’ve been very helpful with my 2 Puch’s. But now I have the chance to grab a motobecane and have always wanted one. Can’t wait to go thru these videos again when I start the Moby project. Thanks for all your time spent making these phenomenal videos.
I actually bought one and didn’t see the frame was bent but I just picked another up and got it running. I think I like the motobecane more than my Puch’s now! Anyway I could chat with you about my up coming motobecane build?
Hey Dave, I stumbled across your restoration videos and honestly at first I thought you were a bit crazy, and barley made it through the first video, but you won me over and I watched the whole series. Great job bud! I just started a 1979 50v restoration and have learned a lot from your vids. This will be my second restoration, but as you know everyone of them are different and has their own challenges. I appreciate you sharing your experiences with everyone. Thank you. B
@@DavidFixesHisShit Hi David. Do you by any chance know the spark plug for the AMI50 motor that is on an. Indian (brand) moped? Great work on that motobecane it looks beautiful!
Nice build. Those Motobecanes are pretty cool looking. Real eye catchers. I've got a Tomos LX myself i need to get around to making faster. There's somthing rewarding about working on mopeds. Its just knowing that if anything happens to it you can fix it and make it better than it was!
Agree. I like knowing that I've had my hands on every piece and part of the moped that I'm riding. When it is dialed in, nothing beats that sense of accomplishment..
Great video series, I just picked up a 1980 Moby along with its cousin the Road Runner for a parts donor. Both are in rough shape. Thanks for sharing your journey. Btw…You sound more authoritative at 1.75 playback speed.
David, thanks for everything I learned watching your yellow Motobecane restoration videos. My Motobecane was in storage for 18 years. I finally got it running today. I posted a video thanking you for all your help. "Big Thanks to David fixes his shit " Next is CDI!
Hey! Thanks so much for that. It brought a huge smile to my face. I showed it to my kids and got some ‘Cool Dad’ points for it. That Moby of yours is beautiful!
Hi David, you're a funny guy :-D Just binged the entire 21 episodes of your Moby restoring. Great set of videos, really! I'm impressed by the thoroughness that you go into these projects with. And I love that you share your findings, both success and failures. I have two model 40 myself that needs restoring, learned a ton from watching your videos. I did cry a few times though everytime you pounded those old french ladys by spinning the pedals while it's on the centerstand. And when you removed the crankshaft in episode 14 at 6:55, banging the thread with a hammer. Why didn't you use a rubber hammer like you did in episode 7? Thank you for making these videos, really appreciate it. Cheers from Denmark (no its not Sweden)
I just purchased one of these and 3 hours ago I didn't even know what they where. Your channel is absolutely great and I'm looking forward to watching more. Do you have a master parts/mods list you did or recommend so I can go on a similar journey? I'd binge watch all of this right now if I could but life n' stuff. I'll get there eventually! Thanks for putting in the time on these videos!
Hey Corey. No heat issues at all. I was certainly keeping an eye on it at first, thinking I would have to play with the timing to bring it down, but I’ve had the timing at 1.2mm all the way to up to 2mm. I’ve never hit more than about 325F. I’m around 1.4 BTDC now and my temp is around 290 all the time.
Wow, ok great to hear! The consensus on moped army seems to be that those kits run well over 400 and eventually fuse themselves into a solid block. I just got a treats shipment and will be doing pretty much the same set up you have. Thanks again for the videos, keep it up!
Ha! Bit of a disclaimer here though... I don’t have a trail tech or any sort of sensor on my plug. I’m just using a laser reader that I put on the base of the plug while sitting at stop lights after ripping. So 325 might not be exact, but it certainly isn’t 75F off. You should be good to go!
Dave, with Whit moving to the outfield I think you’ve got a shot at 2nd, come back to KC! Oh, and please let me know how you found the factory order out on your Mobylettes
hey I am trying to dial in a same yellow moby with a Doppler, Airsol, and Sha 15, what was the final Jet and plug that you settled on?? thanks.! hope to see you at the next rally!
Plug I settled on was a B8HS, but last summer I threw a B7HS in there because it was all I had, and I've been running with that without any problem. The jet changes occasionally, but hovers between 74-78, depending on time of year. Hope that helps!
AWESOME! I have a Cady, Peugeot 104 and a Solo mini 725. Looking to do some real mods. Got the 104 looking pretty cool but still running stock. Keep the vids coming!
Hello David, thanks for the great videos, do you have any background as a camera man? anyway, I just bought a motobecane, its has the av7 engine which I think is a lot like yours, mine is all stock now, I want to build it into a café style bike with the same engine mods as you, my bike runs and drives and just had a tune up last year, starts great, I have had bikes for my whole life, i'm now 58, my first bike was a mini bike in 1970, its great you showed your whole process, the good and the not so good, thanks again.
Lawrence. No background as a camera man. I’m learning on the job :-). The wife and kids gave me a new camera for Christmas and I’ve been learning how to use it slowly. It’s... complicated. But when it works, it’s awesome. I’ve been filming the new build with it. Hopefully it’s not unwatchable. I love those 1970s mini bikes. I want one so badly!!
Your back. Hell yeah! This was fun. I was smiling quite a lot when you where modifying the clutch. Been there. Done exactly the same. I'm fairly curtain that you didn't buy a orginal MBK variator and clutch. This was the cheap Transval knokoff. I bought the same one years ago. I modified the same things. Almost everything Transval makes is crap. I'm surprised you used the Malossi variator. I tried this too but the larger diameter Malossi pulley hit the large pulley. There wasn't enough space when the motor is tilting backwards. How did you do this? Your top speed is completely nuts :P Love it.
Frank -- You're probably right. I did buy the expensive one from treats ($105 vs $70 for the cheap one) and they sell it as 'Original MBK variator', but it was made by Yamaha. I saw that on the packaging when I received it. Anyway, after you told me to change out the clutch springs and arms, I went ahead and did that, and it seemed to work a treat! As far as the Varplus -- well, thats one of the things that didn't make it into the video. I had to somehow chop 40+ hours of footage (and probably 100+ hours of actual tinkering) into a 40 min video. So I had to pick and choose what I put in. I also had some interference with the big pulley when I first put on the Varplus. So I pulled the variator plate off and put it into my grinder, as if it was a grinding wheel. Then I turned on the grinder and held the plate against a sharpening stone for about 30 seconds and took off the back lip of the variator plate. I didn't lose any of the height of the plate, but I basically sharpened it to a pretty sharp edge, taking off maybe a bit more than a mm. That seemed to do the trick. I won't say I have a lot of clearance between the two, but it doesn't kick off sparks anymore, so I'm calling it a 'win'! Now that I've seen the motor fully variate, I can see that I still have about a cm between the highest that the belt gets and the edge of the variator plate, so I think I could've safely nipped off a few mm off the top and been fine, but it seems to be working, so I'm leaving it alone. Thanks again for your advice during this build. You really helped me outta some tough spots!
Hi David, Your most welcome ;) I had a good time watching your videos. It is fun to see someone else struggle with the same issues you have been struggling with for so many times :P Regarding MBK and yamaha. In 1981, the original Motobécane filed for bankruptcy and was purchased by Yamaha and reformed in 1984 as MBK. So Yamaha is original MBK nowadays. I also had a look at modifying the varplus. I think I had to remove to much material to even attempt it. I don't really remember. One warning about those varplus pulleys. Your belt can ride above the pulley if the pulley can move the whole way. This is dangerous. I actually put a ring in between the pulleys to restrict the movement of the varplus pulley to prevent this. This works fine. Here is a video of my "little" MBK project. It took me 3 years to get to the point in this videos. This video was made 1 year ago. Last week was the first time I was able to actually ride this thing properly. You won't believe how many issues I had and still have with this one! I still cannot ride more than half throttle. Why didn't I fix this? It was not even important enough to make it on the list of problems I had to solve. I think by now it is finally time to mess with the bad carb. 4 years are gone. Many more years are necessary for this one :P fransseo.home.xs4all.nl/Foto's/99z/99z/59%20Mechnische%20restauratie%20afgerond.avi
Holy moly! That bike of yours is gorgeous. Ive heard of those 99z's, but I don't think they ever made it to the states. Did they have two pistons? I thought I remembered reading that they did. Yours looks mint!
I'm not sure where these bikes were sold. Definitely not the Netherlands. I was really lucky to buy this one in the Netherlands. I was afraid I had to go to France to buy one. I really wanted one because of the engine. The person who sold it had an interesting way of selling this bike. He posted only a few words. For sale 99z. Those how don't know what it is where not worthy. I have been looking for 2 years for this bike so I knew what it was. I even knew the seller and I bought straight away. Luckily I didn't care about the mechanical state of the moped because everything that moves was in desperate need of restoration. Mechanics are the problem. The bike itself is actually in relatively good state. I haven't done anything regarding paint or chrome. The engine has two pistons. It also has a reed valve because the blowback would be insane without one. The engine has an almost flat torque curve from 2000 up to 5500 rpm. Peak power is at 6000 rpm and it has 3 horsepower. It is surprisingly slow for that extra piston. It can reach 55km/h. I have reached this speed so I can confirm it. I think I can get more out of it by variator tuning. But that is for a later time. The lack of vibration of the engine is really cool. I don't feel any anything when running 1/4 throttle. The engine still runs somewhere between 40 to 50km/h at 1/4 throttle which I find really weird.
Im about to purchase one, a 1976 and it looks like its in great condition. Do you have any information on how much these should run for and a place to look at prices and what i should look for to see if i am getting a great deal?? Any info would be awesome. Thanks.
Heya Darren. I bought both of mine for $400. Of course they hadn’t run in 30 years. And a lot of moped pricing depends on where in the country you live. A great condition, running Moby here where I live would sell for about $600-$700. But in NYC, it could be $1000+. I think if you can get it under $500 and it runs well, then it’s probably a good deal. Check the tank to make sure it isn’t rusted. Other than that, just give it a spin and make sure you like it.
@@DavidFixesHisShit awesome. Ok thank you. The guy says he doesnt have a title and it only has 37 miles on it. Looks like new and says it runs. He bought it when he was 14. Im just a fan of these vintage bikes and love the looks and style of them.
Heya Ben. Final timing was at 1.5mm BTDC. I went through a bunch of timings tho. I had it at 1.2 for awhile to see if that would lower temps, but it didn’t. I didn’t notice any performance difference between 1.2 and 1.5, but def noticed when I went from 1.5 to 1.8. It seemed a bit sluggish, and temps went up about 20F.
Ben... Is your gearing the same? 11-54? I think thats why my top speed is so high. It takes forever to get there, because I don't have any torque at all, but after I'm up there... woo hoo!
Hey man, i've been watching the series since it started and i've watched the episodes MANY TIMES, i bought an AV7 engine to put in mine but i want to get it running AWESOME, so im probably gonna go the AV10 way as it would be my daily transportation, tell me your toughts on converting it and if i can add you to talk on any social network i would love that :D Thanks and keep making videos man :D
Hey Danny. Thanks for watching. If you already have an AV7, then my advice would be to use it! I don't think you're gonna get anything special outta the AV10. Your bike looks freakin cool (I watched your videos) and it sounds like you are going to kit it anyway, so just to stick to the AV7. It'll be cheaper, and you won't get anymore speed or reliability outta the AV10. As far as social networks go --- I'm old :-). I have a hard enough time keeping up with people in person, much less online. Keep at it -- and get yourself a proper toolbox! ;-)
Oh my god you actually watched my videos with me asking :O Thanks man that really means alot :D Im probably going the AV10 route anyways or av7, depending on how stuff fits, im actually gonna pick up parts thursday :) And im working on the toolbox already ahah, getting a new shop soonish :D Thanks again for replying and if you want to keep updated about the moby you can sub or keep checking my channel if you want to ;-) Thanks for all the videos you made until now and keep doing them :D
hey dave please for the love of God & all that is Holy...get a 1977 Peugeot 103, they are very popular & very different than the moby is....i'm begging...i've never begged before.
How come you had to put up license plates because were I live this moped is legally classified as a motor assisted bicycle and you don’t need license plate as long as your under 30 miles per hour (about 50 kilometers)
To be honest, that didnt look like 62mph to me. I doubt the speedo is accurate, i dont think its matched to the bike. Looked like about 48-50mph. I think you gotta try gps, maybe im wrong, but id love to see it!
I bought a 1979 Motobecane Mobylette 50V a few days ago and discovered this series the next day. I just finished episode 21. These videos are a fantastic resource and have already helped me in just the last couple days. Great job, and thank you!! And yes. the music is great and fits these videos really well.
Wow.... I just want to say thank you. You did an incredible job on this series. I binged all the videos over the course of two days and I feel like I somehow know you even though we've never met. I bought a 76' Motobécane Moblyette 50V from a guy in St. Augustine a few weeks ago and i'm in the process of restoring it. Thank you for documenting this entire process so well... I appreciate it more than you know!
Thoroughly enjoy your videos, im hooked! Down to earth guy with a very good approach. Love that you also share your small errors.
Top bloke
Thanks a lot Steve! I appreciate the kind words. Thanks for watching!
Thanks David! I'm restoring a dutch motobecane variant myself and I learned a lot from you. 100 km/h on these is just insane!
This series brought me back. My first moped was a yellow Moto with the variator. I bought it used from a friend sometime around 1978 - 80. I had a lot of fun with that thing. Larter I had a Puch Maxi and then another Puch that had a horizontal fuel tank and a two speed auto transmission. Once I was old enough to get a motorcycle license, I traded that last Puch for an old Honda 350... lol Thanks for reminding me of the great fun I had as a kid with mopeds!
Thanks for watching Nick. Puch for a Honda 350 sounds like you got a pretty sweet deal :-)
LOL I don’t know about good deal. It was a relatively new Magnum and the 350 was a clapped out POS..... 😂
all hail dave and his shit!! i bought a 40T at a flea market in france for 60 euro, didnt run, seized up,
watched all your videos, learned a ton and i love the thing now.. all stock so far..
time go deeper.. thank you Dave, and the tunes! yeah!
Wow. Thanks! That’s a hell of a deal even for a seized up moped.
Hey David, I just got into the moped world a little over a year ago and love your videos, I just bought a 1979 Motobecane Moby 50V and love it. Watching this video shows me how they can be super fun as well being a pain in the butt. Thanks again my dude!
Great videos. Had me smiling and felt the excitement going down the other side of that bridge. Built my Av7 with a variator and 15mm Dellorto. Next few months I will be fitting the Airsal. Thanks again.
Good luck with your build. What is the gearing on your Moby? I’m thinking about changing mine before the summer so my top speed decreases and my acceleration increases.
Your Videos are great David, I love your enthusiasm and awesome sense of humour! 66 mph is pretty darn fast! Looking forward to your next project and more great laughs!
Wow! Thanks a lot! I really appreciate that! Hopefully the next project turns out as fun as this one was...
I’ve been watching lots of your videos and they’ve been very helpful with my 2 Puch’s. But now I have the chance to grab a motobecane and have always wanted one. Can’t wait to go thru these videos again when I start the Moby project. Thanks for all your time spent making these phenomenal videos.
Hope you got the Moby! They are a different animal from Puch's, but very fun, and if done right, super fast! Thanks for the kind words!
I actually bought one and didn’t see the frame was bent but I just picked another up and got it running. I think I like the motobecane more than my Puch’s now! Anyway I could chat with you about my up coming motobecane build?
Thanks for the journey David this is my life blood for fixing my moby! No other videos like it on the internet!
Well done on your build ,looks amazing, I'm in the middle of a restoration of a 1972 50n moby ,it's great fun stripping and rebuilding ,
The one thing that I've learned in these videos is that DAVID DEFINITELY FIXES HIS SHIT. Bravo sir, these videos are fantastic 👍
Thanks again.. I really appreciate you watching!
Great videos David, I learned a lot from this series. Waiting for more interesting stuff!!
Thanks. I'm glad if they helped even a bit. I'm started the next project last week and now I'm just waiting for parts to come in...
Really enjoyed this series. Looking forward to the next one ☺
Thanks a bunch for watching. I'm hoping the next project turns out as good as this one did!
Hey Dave, I stumbled across your restoration videos and honestly at first I thought you were a bit crazy, and barley made it through the first video, but you won me over and I watched the whole series. Great job bud! I just started a 1979 50v restoration and have learned a lot from your vids. This will be my second restoration, but as you know everyone of them are different and has their own challenges. I appreciate you sharing your experiences with everyone. Thank you. B
I am a bit crazy! Thanks for watching!
you are awesome, David!
Ha! Can I give you my wife’s email address so you can tell her the same thing??
70 km/h on a moped.. wow. 80 km/h on this moped...! 90 km/h on this thing..!!!!!!!! 100.. :-O You maniak! ( I love it!)
Awesome..will start soon with my own Motobecane.And thnks of you it will be ok,,,love your videos Thanks again...
Man, that was awesome. Totally scary to go that fast on a moped but exhilarating at the same time.
Yes. I haven’t done it again since :-). 3/4 throttle and 50mph is just about right for me 🤓
@@DavidFixesHisShit Hi David.
Do you by any chance know the spark plug for the AMI50 motor that is on an. Indian (brand) moped?
Great work on that motobecane it looks beautiful!
@@DavidFixesHisShit i meant to say the gap. Sorry
Nice build. Those Motobecanes are pretty cool looking. Real eye catchers. I've got a Tomos LX myself i need to get around to making faster. There's somthing rewarding about working on mopeds. Its just knowing that if anything happens to it you can fix it and make it better than it was!
Agree. I like knowing that I've had my hands on every piece and part of the moped that I'm riding. When it is dialed in, nothing beats that sense of accomplishment..
Great video series, I just picked up a 1980 Moby along with its cousin the Road Runner for a parts donor. Both are in rough shape. Thanks for sharing your journey. Btw…You sound more authoritative at 1.75 playback speed.
David, thanks for everything I learned watching your yellow Motobecane restoration videos. My Motobecane was in storage for 18 years. I finally got it running today. I posted a video thanking you for all your help. "Big Thanks to David fixes his shit " Next is CDI!
Hey! Thanks so much for that. It brought a huge smile to my face. I showed it to my kids and got some ‘Cool Dad’ points for it. That Moby of yours is beautiful!
Hi David, you're a funny guy :-D
Just binged the entire 21 episodes of your Moby restoring. Great set of videos, really! I'm impressed by the thoroughness that you go into these projects with. And I love that you share your findings, both success and failures. I have two model 40 myself that needs restoring, learned a ton from watching your videos.
I did cry a few times though everytime you pounded those old french ladys by spinning the pedals while it's on the centerstand. And when you removed the crankshaft in episode 14 at 6:55, banging the thread with a hammer. Why didn't you use a rubber hammer like you did in episode 7?
Thank you for making these videos, really appreciate it.
Cheers from Denmark (no its not Sweden)
Great video dave
☆☆☆☆☆☆☆☆☆☆☆☆
I feel your pain. I replaced the decomp valve on my Peugeot 103 a few weeks ago. What a pain in the ass.
we should have him do a DFHS peugeot 103 series
beau travail sur cette mobylette !!
Bummin it's ova!!! Just fired up a basket Moby today for the first time. I'm sitting on 3 Moby's at the moment. Lil bastards multiply like bunnies.
You know what they say... once you’ve seen one Moby, you wanna see all of em!
Right as rain!!!! am so looking forward to your next project!! out takes of your scooter chair antics made me drizzle pee from laughing!!
I just purchased one of these and 3 hours ago I didn't even know what they where. Your channel is absolutely great and I'm looking forward to watching more. Do you have a master parts/mods list you did or recommend so I can go on a similar journey? I'd binge watch all of this right now if I could but life n' stuff. I'll get there eventually! Thanks for putting in the time on these videos!
Thanks for the videos Dave! Have you had any heat issues with this setup (400+ degrees)?
Hey Corey. No heat issues at all. I was certainly keeping an eye on it at first, thinking I would have to play with the timing to bring it down, but I’ve had the timing at 1.2mm all the way to up to 2mm. I’ve never hit more than about 325F. I’m around 1.4 BTDC now and my temp is around 290 all the time.
Wow, ok great to hear! The consensus on moped army seems to be that those kits run well over 400 and eventually fuse themselves into a solid block. I just got a treats shipment and will be doing pretty much the same set up you have. Thanks again for the videos, keep it up!
Ha! Bit of a disclaimer here though... I don’t have a trail tech or any sort of sensor on my plug. I’m just using a laser reader that I put on the base of the plug while sitting at stop lights after ripping. So 325 might not be exact, but it certainly isn’t 75F off. You should be good to go!
Dave, with Whit moving to the outfield I think you’ve got a shot at 2nd, come back to KC! Oh, and please let me know how you found the factory order out on your Mobylettes
hey I am trying to dial in a same yellow moby with a Doppler, Airsol, and Sha 15, what was the final Jet and plug that you settled on?? thanks.! hope to see you at the next rally!
Plug I settled on was a B8HS, but last summer I threw a B7HS in there because it was all I had, and I've been running with that without any problem. The jet changes occasionally, but hovers between 74-78, depending on time of year. Hope that helps!
@@DavidFixesHisShit thanks dave!!
I found ("I unearthed") a pair of these and I need some tires ... would you know where I might find them ?? . NICE CLIP !.
Treatland.tv has every size of tire you may need.
well done
AWESOME! I have a Cady, Peugeot 104 and a Solo mini 725. Looking to do some real mods. Got the 104 looking pretty cool but still running stock. Keep the vids coming!
Those are some freakin cool bikes!
Thanks David! Looks like the French go faster than the Italians! At least for now, haha!
Was there a reed valve fitted?
No reed valve.
Hello David, thanks for the great videos, do you have any background as a camera man? anyway, I just bought a motobecane, its has the av7 engine which I think is a lot like yours, mine is all stock now, I want to build it into a café style bike with the same engine mods as you, my bike runs and drives and just had a tune up last year, starts great, I have had bikes for my whole life, i'm now 58, my first bike was a mini bike in 1970, its great you showed your whole process, the good and the not so good, thanks again.
Lawrence. No background as a camera man. I’m learning on the job :-). The wife and kids gave me a new camera for Christmas and I’ve been learning how to use it slowly. It’s... complicated. But when it works, it’s awesome. I’ve been filming the new build with it. Hopefully it’s not unwatchable. I love those 1970s mini bikes. I want one so badly!!
Hey Dave, what octane are you using for your mopeds?
I use mid-grade usually. So like 89-91?
How much would a 78 model be worth had 345 miles on it before the coil quit working been in barn since 81 i got it out last year and cleaned it up
Hey David! What carb setup did you end up running on this?
15 SHA. I change out the jets depending on ambient temp, but usually hovering around 72-78.
Your back. Hell yeah!
This was fun. I was smiling quite a lot when you where modifying the clutch. Been there. Done exactly the same. I'm fairly curtain that you didn't buy a orginal MBK variator and clutch. This was the cheap Transval knokoff. I bought the same one years ago. I modified the same things. Almost everything Transval makes is crap.
I'm surprised you used the Malossi variator. I tried this too but the larger diameter Malossi pulley hit the large pulley. There wasn't enough space when the motor is tilting backwards. How did you do this?
Your top speed is completely nuts :P Love it.
Frank -- You're probably right. I did buy the expensive one from treats ($105 vs $70 for the cheap one) and they sell it as 'Original MBK variator', but it was made by Yamaha. I saw that on the packaging when I received it. Anyway, after you told me to change out the clutch springs and arms, I went ahead and did that, and it seemed to work a treat!
As far as the Varplus -- well, thats one of the things that didn't make it into the video. I had to somehow chop 40+ hours of footage (and probably 100+ hours of actual tinkering) into a 40 min video. So I had to pick and choose what I put in. I also had some interference with the big pulley when I first put on the Varplus. So I pulled the variator plate off and put it into my grinder, as if it was a grinding wheel. Then I turned on the grinder and held the plate against a sharpening stone for about 30 seconds and took off the back lip of the variator plate. I didn't lose any of the height of the plate, but I basically sharpened it to a pretty sharp edge, taking off maybe a bit more than a mm. That seemed to do the trick. I won't say I have a lot of clearance between the two, but it doesn't kick off sparks anymore, so I'm calling it a 'win'! Now that I've seen the motor fully variate, I can see that I still have about a cm between the highest that the belt gets and the edge of the variator plate, so I think I could've safely nipped off a few mm off the top and been fine, but it seems to be working, so I'm leaving it alone.
Thanks again for your advice during this build. You really helped me outta some tough spots!
Hi David,
Your most welcome ;) I had a good time watching your videos. It is fun to see someone else struggle with the same issues you have been struggling with for so many times :P
Regarding MBK and yamaha. In 1981, the original Motobécane filed for bankruptcy and was purchased by Yamaha and reformed in 1984 as MBK. So Yamaha is original MBK nowadays.
I also had a look at modifying the varplus. I think I had to remove to much material to even attempt it. I don't really remember.
One warning about those varplus pulleys. Your belt can ride above the pulley if the pulley can move the whole way. This is dangerous. I actually put a ring in between the pulleys to restrict the movement of the varplus pulley to prevent this. This works fine.
Here is a video of my "little" MBK project. It took me 3 years to get to the point in this videos. This video was made 1 year ago. Last week was the first time I was able to actually ride this thing properly. You won't believe how many issues I had and still have with this one! I still cannot ride more than half throttle. Why didn't I fix this? It was not even important enough to make it on the list of problems I had to solve. I think by now it is finally time to mess with the bad carb. 4 years are gone. Many more years are necessary for this one :P
fransseo.home.xs4all.nl/Foto's/99z/99z/59%20Mechnische%20restauratie%20afgerond.avi
Holy moly! That bike of yours is gorgeous. Ive heard of those 99z's, but I don't think they ever made it to the states. Did they have two pistons? I thought I remembered reading that they did. Yours looks mint!
I'm not sure where these bikes were sold. Definitely not the Netherlands. I was really lucky to buy this one in the Netherlands. I was afraid I had to go to France to buy one. I really wanted one because of the engine. The person who sold it had an interesting way of selling this bike. He posted only a few words. For sale 99z. Those how don't know what it is where not worthy. I have been looking for 2 years for this bike so I knew what it was. I even knew the seller and I bought straight away. Luckily I didn't care about the mechanical state of the moped because everything that moves was in desperate need of restoration. Mechanics are the problem. The bike itself is actually in relatively good state. I haven't done anything regarding paint or chrome.
The engine has two pistons. It also has a reed valve because the blowback would be insane without one. The engine has an almost flat torque curve from 2000 up to 5500 rpm. Peak power is at 6000 rpm and it has 3 horsepower. It is surprisingly slow for that extra piston. It can reach 55km/h. I have reached this speed so I can confirm it. I think I can get more out of it by variator tuning. But that is for a later time. The lack of vibration of the engine is really cool. I don't feel any anything when running 1/4 throttle. The engine still runs somewhere between 40 to 50km/h at 1/4 throttle which I find really weird.
Im about to purchase one, a 1976 and it looks like its in great condition. Do you have any information on how much these should run for and a place to look at prices and what i should look for to see if i am getting a great deal?? Any info would be awesome. Thanks.
Heya Darren. I bought both of mine for $400. Of course they hadn’t run in 30 years. And a lot of moped pricing depends on where in the country you live. A great condition, running Moby here where I live would sell for about $600-$700. But in NYC, it could be $1000+. I think if you can get it under $500 and it runs well, then it’s probably a good deal. Check the tank to make sure it isn’t rusted. Other than that, just give it a spin and make sure you like it.
@@DavidFixesHisShit awesome. Ok thank you. The guy says he doesnt have a title and it only has 37 miles on it. Looks like new and says it runs. He bought it when he was 14. Im just a fan of these vintage bikes and love the looks and style of them.
Where do you get the music?
I make it myself! Happy you like it!!
I like them very much
I know it's been 2 years but I have almost the same config on my bike. I need a schematic to get my lights to work. Got any thing?
PM me your email and I’ll send you my wiring diagram.
0:30
whats your spark plug no ?
I ended up using NGK B8HS for the kitted motor and B6HS for the stock motor. Thanks for watching!
David Fixes His Shit Thank you David! Have a nice days
Whats your timing at?
Heya Ben. Final timing was at 1.5mm BTDC. I went through a bunch of timings tho. I had it at 1.2 for awhile to see if that would lower temps, but it didn’t. I didn’t notice any performance difference between 1.2 and 1.5, but def noticed when I went from 1.5 to 1.8. It seemed a bit sluggish, and temps went up about 20F.
Ok thanks, i have the exact same set up as you except my moby is a 77. Trying to grt it to hit 66 lile you! Haha
Ben... Is your gearing the same? 11-54? I think thats why my top speed is so high. It takes forever to get there, because I don't have any torque at all, but after I'm up there... woo hoo!
Hey Dave let me know if you ever wanna sell it
I fall in love with these bikes. I can’t bring myself to part with them. It’s turning out to be a problem 🤓
nice
Hey man, i've been watching the series since it started and i've watched the episodes MANY TIMES, i bought an AV7 engine to put in mine but i want to get it running AWESOME, so im probably gonna go the AV10 way as it would be my daily transportation, tell me your toughts on converting it and if i can add you to talk on any social network i would love that :D Thanks and keep making videos man :D
Hey Danny. Thanks for watching. If you already have an AV7, then my advice would be to use it! I don't think you're gonna get anything special outta the AV10. Your bike looks freakin cool (I watched your videos) and it sounds like you are going to kit it anyway, so just to stick to the AV7. It'll be cheaper, and you won't get anymore speed or reliability outta the AV10. As far as social networks go --- I'm old :-). I have a hard enough time keeping up with people in person, much less online. Keep at it -- and get yourself a proper toolbox! ;-)
Oh my god you actually watched my videos with me asking :O Thanks man that really means alot :D Im probably going the AV10 route anyways or av7, depending on how stuff fits, im actually gonna pick up parts thursday :) And im working on the toolbox already ahah, getting a new shop soonish :D Thanks again for replying and if you want to keep updated about the moby you can sub or keep checking my channel if you want to ;-) Thanks for all the videos you made until now and keep doing them :D
Hey David !!!
Hey Guillaume!
hey dave please for the love of God & all that is Holy...get a 1977 Peugeot 103, they are very popular & very different than the moby is....i'm begging...i've never begged before.
Well... I did get a Peugeot :-)
@@DavidFixesHisShit ...thank you, i'll pay you back w/my paper route money....are you going to freshen it up w/rings etc? my eyeballs are glued...
How come you had to put up license plates because were I live this moped is legally classified as a motor assisted bicycle and you don’t need license plate as long as your under 30 miles per hour (about 50 kilometers)
To be honest, that didnt look like 62mph to me. I doubt the speedo is accurate, i dont think its matched to the bike. Looked like about 48-50mph. I think you gotta try gps, maybe im wrong, but id love to see it!
Hey man. Thanks for watching. I live by a creed: Never trust a speedo. Always use GPS! :-)
Hey david, check out my sound test for my av10 video ;)
Danny -- It sounds great! How does she ride?
pretty good, no variator on it so i have ALOT of acceleration but only 50kmph