Chiefpep , hey man ! Nice to find someone else making videos for these cool old bikes 👍. I’ll add a link to your cafe racer vid at the end of my bobber time lapse so folks can see a cafe style mod for these as well if they find my channel first
stephen Atkins, thanks ! Glad you found it helpful. My video skills aren’t the best, but figured it might help someone willing to keep these cool old bikes running 👍
Thanks…glad the video was helpful 👍. For the reinstall, it’s pretty straight forward. The only thing to really worry about is getting the flywheel timing mark lined up with the intermediate gear mark, but both have indents on the gears and you can always check that the cam gears line up after install by rotating the motor around with a wrench slowly (if it binds at ant point in the rotation, stop as this may mean it is out of time and the valve has touched the piston so you’ll have to rotate it back and set the timing up ). Here’s a link to another video on the channel where I do the final assembly after a rebuild on one…at about the 22:55 minute mark, I show putting the pump and flywheel back on (it’s in high speed, but you can slow UA-cam down by clicking the three little dots in the upper right of the video and selecting the speed I believe): ua-cam.com/video/HDWHo7tqWoc/v-deo.html . In one if the first videos in this motor rebuild series, it shows how to check the timing to be sure you have it correct. Thanks again and all the best ! Steve
Hey man ! Two of the three bolts are just regular Allen head metric bolts…one is a M6x20mm and the other is a M6x50mm. The bolt towards the bottom is a special Yamaha bolt and is part number: 90109-06511-00. They can usually be bought through places on the web like boats.net or partzilla. Hope this helps and all the best ! Steve
Great video i have. A 82 750xv virago bought it with front cylinder not working do to bent exhaust valve? Any idea what would cause that? Thinking of doing a whole rebuild but just curious
Eddie Geee , thanks ! I actually got one of the motors in the video in the very same condition (bent exhaust valve on the front). For mine it was caused by the previous owner not realizing that the small pin that links the timing gear to the cam was broken and was too short to keep the gear in position to the cam. It allowed the pin to slowly eat the hole in the gear open and moved the timing to the point what the exhaust valve hit the piston. For mine, the piston and head were still ok...only had to replace the valve. Other ways it could happen would be if it jumped time from a broken or incorrectly assembled chain guide, a broken guide tensioner, or if someone just assembled it incorrectly and cranked it over before checking maybe. In all cases, it would only be caused if the timing somehow got out of sync. The front and back cams ARE different so if it had just been worked on, it might have gotten put back together wrong too (not 100% sure if putting the cams in the wrong head would actually interfere with the piston though). Hope this helps...glad to hear another one of these may be getting back on the road👍. I have an ‘81 750 and also just finished my bobber project on my ‘82 from the motor I was working on (it’s out on my UA-cam channel as well)
Hello, yes, the 1st Gen xv750 motor is virtually the same as the xv1000 motor for the disassembly and motor internals except that the xv1000 has the additional starter solenoid on the left side cover that has to be removed to pull the side cover off. On the channel under the xv1100 playlist is a video on removing its side cover that also has the extra starter solenoid so it would probably be a better comparison video for the xv1000. Hope this helps and all the best ! Steve
@@StevesDIYs thanks alot ,im fairly new at yamahas and im having a lot of trouble with starter i can turn the engine on , after a bit of search i will probably need to change the starter with a 4 brushes one , i hope that will fix it
Hi Steve, I have the same bike but after changing the exhaust,air filter and jets the bike has little compression and refuses to start. You might have an idea of the issue? Maybe just a clue?
Honfleur Tours , hello. I don’t think any of these changes would impact the compression of the cylinder...how much compression do you have on each cylinder? For the exhaust change, that shouldn’t affect if it runs or no, just slightly changes the air/fuel mix. For your jet change and air filter change, did you increase the jet size and also change from the stock air filter to individual air filters? If you changed the jet size to bigger and changed to pod style or individual air filters (like I did on my Bobber), you will need to experiment some to balance the air fuel mix. Just let me know, Steve
@@StevesDIYs thank you so much for taking time replying to me. Knowing the compression was lost when new jets were fitted to the bike I will check the carbs then. (At the moment there's not enough compression to even start the bike). You are awesome dude. Thank you a million!
Yep, I have a couple spare motors in the garage right now with magic mystery oil in them hoping they will break free, lol. When I get a spare motor, I just fill up the cylinders and put them away for 6 months or so. 3 out of the 4 previous motors have freed back up and turned out to be good runners.
Rafael Aquino , hello...I think I got it from Advance Auto or Oreilys Auto. It’s actually called a Harmonic Balancer Puller and was the ~$35-$40 one versus the cheap ~$20 one as it needs to be pretty strong to get this flywheel off. Hope this helps, Steve
Btw, that slack on the oil chain is normal. In some oil gear covers you find a tensioner. But it's not needed. But what exactly is the problem on the engine?
Chiefpep , I got this bike for parts for a couple hundred to fix some broken things on my stock ‘81, but when I got it home and looked at it, the guy I bought it from had replaced the head gaskets, but set the timing wrong and bent a valve. That was all that was really bad, so I hated to part it out so I ended up getting another parts bike that was beyond hope to fix my stock bike, lol. This motor (other than the bent valve), had a slight but distinct slap sound each time on deceleration (I fired it up when I first replaced the valve and probably never would have noticed it except that my other bike didn’t make that slight pop sound each time the throttle was dropped). Once I replaced the really loose chain with the less loose chain it went away and sounded great. This bike and the engine is now the bobber that I did the time lapse on recently on my channel 👍
@@StevesDIYs Aha! Great to hear. The Virago's are known for the loose chains. They indeed perhaps make unnecessary noise which is not needed. But the pump will stay working. Great you fixed it. Immediately gonna watch that video now!
nice Steve, gonna rebuild my Vairago 750 up here in Tok Alaska thanks for the Info. Redneck 101 I love it
Thanks man ! Yep, these aren’t very hard to work on…just some basic tools and a little redneck ingenuity, lol ! Happy New Year and all the best !
Why didn't we find our channels before?! Great and keep wrenching on those XV's!
Chiefpep , hey man ! Nice to find someone else making videos for these cool old bikes 👍. I’ll add a link to your cafe racer vid at the end of my bobber time lapse so folks can see a cafe style mod for these as well if they find my channel first
@@StevesDIYs Great thanks! If there is anything I can do for you or you need any advice on something, please let me know!
Thankyou Soooooooooooooooooooooooo, much. This makes it super straight forward. Thanks
stephen Atkins, thanks ! Glad you found it helpful. My video skills aren’t the best, but figured it might help someone willing to keep these cool old bikes running 👍
Hey Steve - great video. Do you have instructions on how to reinstall it anywhere? I heard it's tricky... is that true?
Thanks…glad the video was helpful 👍. For the reinstall, it’s pretty straight forward. The only thing to really worry about is getting the flywheel timing mark lined up with the intermediate gear mark, but both have indents on the gears and you can always check that the cam gears line up after install by rotating the motor around with a wrench slowly (if it binds at ant point in the rotation, stop as this may mean it is out of time and the valve has touched the piston so you’ll have to rotate it back and set the timing up ). Here’s a link to another video on the channel where I do the final assembly after a rebuild on one…at about the 22:55 minute mark, I show putting the pump and flywheel back on (it’s in high speed, but you can slow UA-cam down by clicking the three little dots in the upper right of the video and selecting the speed I believe): ua-cam.com/video/HDWHo7tqWoc/v-deo.html . In one if the first videos in this motor rebuild series, it shows how to check the timing to be sure you have it correct. Thanks again and all the best ! Steve
Hey didn’t know how to message you so I’ll comment my question here! Would you happen to know what size bolts go in the oil filter cover?
Hey man ! Two of the three bolts are just regular Allen head metric bolts…one is a M6x20mm and the other is a M6x50mm. The bolt towards the bottom is a special Yamaha bolt and is part number: 90109-06511-00. They can usually be bought through places on the web like boats.net or partzilla. Hope this helps and all the best ! Steve
Great video i have. A 82 750xv virago bought it with front cylinder not working do to bent exhaust valve? Any idea what would cause that? Thinking of doing a whole rebuild but just curious
Eddie Geee , thanks ! I actually got one of the motors in the video in the very same condition (bent exhaust valve on the front). For mine it was caused by the previous owner not realizing that the small pin that links the timing gear to the cam was broken and was too short to keep the gear in position to the cam. It allowed the pin to slowly eat the hole in the gear open and moved the timing to the point what the exhaust valve hit the piston. For mine, the piston and head were still ok...only had to replace the valve. Other ways it could happen would be if it jumped time from a broken or incorrectly assembled chain guide, a broken guide tensioner, or if someone just assembled it incorrectly and cranked it over before checking maybe. In all cases, it would only be caused if the timing somehow got out of sync. The front and back cams ARE different so if it had just been worked on, it might have gotten put back together wrong too (not 100% sure if putting the cams in the wrong head would actually interfere with the piston though). Hope this helps...glad to hear another one of these may be getting back on the road👍. I have an ‘81 750 and also just finished my bobber project on my ‘82 from the motor I was working on (it’s out on my UA-cam channel as well)
Is xv750 same engine as xv1000 , i know is bigger but i mean is it same work
Hello, yes, the 1st Gen xv750 motor is virtually the same as the xv1000 motor for the disassembly and motor internals except that the xv1000 has the additional starter solenoid on the left side cover that has to be removed to pull the side cover off. On the channel under the xv1100 playlist is a video on removing its side cover that also has the extra starter solenoid so it would probably be a better comparison video for the xv1000. Hope this helps and all the best ! Steve
@@StevesDIYs thanks alot ,im fairly new at yamahas and im having a lot of trouble with starter i can turn the engine on , after a bit of search i will probably need to change the starter with a 4 brushes one , i hope that will fix it
Hi Steve, I have the same bike but after changing the exhaust,air filter and jets the bike has little compression and refuses to start. You might have an idea of the issue? Maybe just a clue?
Honfleur Tours , hello. I don’t think any of these changes would impact the compression of the cylinder...how much compression do you have on each cylinder? For the exhaust change, that shouldn’t affect if it runs or no, just slightly changes the air/fuel mix. For your jet change and air filter change, did you increase the jet size and also change from the stock air filter to individual air filters? If you changed the jet size to bigger and changed to pod style or individual air filters (like I did on my Bobber), you will need to experiment some to balance the air fuel mix. Just let me know, Steve
@@StevesDIYs thank you so much for taking time replying to me. Knowing the compression was lost when new jets were fitted to the bike I will check the carbs then. (At the moment there's not enough compression to even start the bike). You are awesome dude. Thank you a million!
I got two one full of water and stuck.
Yep, I have a couple spare motors in the garage right now with magic mystery oil in them hoping they will break free, lol. When I get a spare motor, I just fill up the cylinders and put them away for 6 months or so. 3 out of the 4 previous motors have freed back up and turned out to be good runners.
Where you buy the pulley
Rafael Aquino , hello...I think I got it from Advance Auto or Oreilys Auto. It’s actually called a Harmonic Balancer Puller and was the ~$35-$40 one versus the cheap ~$20 one as it needs to be pretty strong to get this flywheel off. Hope this helps, Steve
Steve’s DIYs Thanks
Btw, that slack on the oil chain is normal. In some oil gear covers you find a tensioner. But it's not needed. But what exactly is the problem on the engine?
Chiefpep , I got this bike for parts for a couple hundred to fix some broken things on my stock ‘81, but when I got it home and looked at it, the guy I bought it from had replaced the head gaskets, but set the timing wrong and bent a valve. That was all that was really bad, so I hated to part it out so I ended up getting another parts bike that was beyond hope to fix my stock bike, lol. This motor (other than the bent valve), had a slight but distinct slap sound each time on deceleration (I fired it up when I first replaced the valve and probably never would have noticed it except that my other bike didn’t make that slight pop sound each time the throttle was dropped). Once I replaced the really loose chain with the less loose chain it went away and sounded great. This bike and the engine is now the bobber that I did the time lapse on recently on my channel 👍
@@StevesDIYs Aha! Great to hear. The Virago's are known for the loose chains. They indeed perhaps make unnecessary noise which is not needed. But the pump will stay working. Great you fixed it. Immediately gonna watch that video now!
t