In this video I introduce the 1978 Yamaha IT 175. I try to start the bike and run into carburetion issues. I do a carb rebuild and then try it again with success.
All IT's were CDI even the original 1976 400. I've never seen one that even had weak spark. The 77-79 250's were incredibly tough, they used the same cases, clutch and bearings as the 400. And the transmissions were interchangable, you could put the six speed in the 400! I swear those transmissions and clutches could handle 100 HP extremely robust. I've pulled ones. All the transmissions I've seen look like new still! These bike were made very well. They also were all six speed except the big bores!😊
I have a 1977 IT 175. Mine sounded loose as well with 2000 miles on the odometer. Did a leak down and compression test. All good. Put a new ring for good measure. Piston and cylinder were in spec. Good bike. Fast for the day.
I think your right, seems like I have heard they are noisy. Will be taking a look and measuring the bore and piston in the future, then we will know for sure.
You have one fantastic performer there. The only differences between the E and F model of any measure were rake pulled on to 28 degrees from 29 and slightly raised ports to increase mid range. Makes no difference to most people. Outstanding trail bike for under 200 lb riders and it actually goes like a train on an Mx track .
Nice trail bike for the woods. Sounds like and looks like stuck rings. I used to work for Flemington Cycle in NJ . They used to sell Yamaha and Hodaka . The IT was the only blue motorcycle in the shop. Good luck, there a lot of fun.
I had one of the first ones to be sold in CA. Loved it, best single-track trail bike of the time. my first mono shock. after a little adjusting, port matching, and installing fiber reeds the bike even performed well in the desert trails as long as the hills weren't too steep and the sand too deep. You just can't beat a 215-lb bike. Wish I could find a 200.
Berryman Chem-Dip Professional Parts Cleaner works great for cleaning carbs. Disassemble as you did, soak in cleaner, rinse with water and spray with WD-40! I've cleaned hundreds this way.
Great find Dale. I don't think I've ever had one that I got started that easily. Minor carb issues have to be assumed as a minimum on these old things.
Off course its gonna run Dale,its a Yamaha! Keep those 2 stroke video's commin,i am in yamaha 2 stroke heaven 🥰 God bless you Dale and the good old US of A ! Greetings from Holland ❤🏍🇺🇲🙏🏻🫡
Thanks for stopping by Tommy, two strokes is what I do, they are fun and affordable. Thanks for all the kind words, and for following the channel, I sure appreciate it.
Good idea Evan will have to work one in at some point, it is not a short or terribly fun thing to do though. Very time consuming unless you just luck out. Our altitude is about 3400 feet, here at the house, much higher in the high country.
Yep you guys are a lot higher used to live there and Denver both. Air force guy. Tuning will have to wait here, over 12 inches of snow on the ground for the last week or so. No good warm up in sight.
Bought this exact same year 1978 IT 175 in November. Rolling chassis with most parts in boxes. Only 2800 on speedo but already +1 over on cylinder. Rod had snapped so far from a quick start up on this one. Fun watching you getting yours going. Always enjoy your videos.
Thats cool Dennis, these things take a lot of time and its just not good to rush them. Nice to hear someone working on the same bike. Good luck with your project.
Good Morning Dale, nice work on the bike! I am going ahead with the upgrades on the 74 TM's as originally planned. I should be finishing up with the 71 TM's this week. Feeling a bit better for the moment.
Nice bike! Very complete and in decent shape. I have a 1980 model with a torn up seat - yours looks like new. These are great running little bikes that are a lot of fun to ride. It's funny while I'm watching the carb work, I'm thinking I'd put a dab of oil on those threads and next thing you know you're reaching for the bottle. I freshened mine up with an oversize piston and rings. Also put in a new crank assembly - I think the rod play was out of spec. Anyway, I'll be watching this one. May get some ideas for my bike.
Thanks, yes it really is in good shape for its age, good prospect for a freshen up. Yeah, I think it's a good idea to lube the threads a bit. Can't hurt right. Will be getting in to the engine to check clearances and such at some time in the future. This one will be torn down to the frame and painted and reassembled. Should be a fun project.
That's a nice one, the IT range was available here, the 465 was popular. I agree the freshen up route is the way to go, it's in very good shape as it is. Best wishes, Dean.
I would love to have that. I’ve had a couple of DT1 250s and loved both. I do have an engine that I was told was a DT1’ 400 no serial number. Never had them. Have you ever heard of that? I need the cover with the clutch adjustment in it. Thanks for sharing the time in your shop.
Hey Ron, these are nice bikes, they do handle much better than the DT's. I have never heard of an engine without a serial number, but hey what do I know any how. Stranger things have happened. You should be able to find a cover on ebay or one of the forums I would think. You bet, stop in anytime, got lots of stuff going on.
I have a 1982 IT125 and a 1978 IT 250. It's normal for them to make rattling sounds like the piston is about to break free. Great bikes from a great era.
Thank you for your comment, I had heard these engines were noisy. I will be going through the engine when I start this restoration, so we will see what the piston clearance is. Your right, these are wonderful machines, this one runs very well, I have ridden it on several rides.
I understand what you are saying about nut and bolt restorations. OEM parts are very expensive and used are getting out of reach as well. Unless it is a bike that you had from your youth and want it back to original, your best bet is to get it running and safe, then go out and enjoy it!
Back in the 80's these were some of the most sought-after two stroke dirt bikes, I love all the IT Yamahas and the 465cc was a monster! This bike is in pretty darn good shape, and I think worthy of a full restoration series Dale, you can sell that thing easily once restored. I think you are correct, those engines did have that pinging more so than other bikes. I would say it needs new piston and rings with a honed cylinder
Hey Dave, yes, this bike will return to the shop at some point. I have got a complete new set of plastic for it and have been collecting parts that I know it needs, will have to take the top end off to measure. I have heard also that they are noisy. But I bet it will need bored, it really does run and ride well, have taken it out a couple times, it's a great machine, and will receive some TLC in the future.
Hey Dale Really fancy an IT460 as my next restoration that sounds like you said loose maybe had a sieze. I have a 78 DT400MX and a 78 DT175MX but really would go for an IT next
19:00 Dale, you have to remember that if all you have is a hammer then sooner or later everything else starts to look like a nail! 42:54 I agree with you, it sounds like its had a hard life, I bet by the time you've finished with it it won't sound like that!
I like that, everything starts looking like a nail......will have to remember it. Yes, we will be checking the bore and piston soon to see what clearance is there.... that will tell for sure.
Hello Dale, I have a 1980 Yamaha MX 175. It look similar to your blue Yamaha. Would you share with me where you find OME parts for that Yamaha? Myron Davis
Hey Myron, yes I order new parts from rockymountainATV/MC.com or you can get them from your local Yamaha dealer, used parts come from ebay or local motorcycle salvage yards.
Not much compression could tell when you first kick it. Duck tape on intake probably has cracks but doesn't really mean leaking. Those have aluminum crank bearing inserts that come loose and act like bearing has play. I just had a 77' in few months ago I did that both inserts were loose.
I traded a 74 MX250 for a 1978 IT175. Not as much power, but much better for the woods and a good bit lighter. I would probably still have it, but places to ride around here pretty much disappeared.
Hey Ed, yes the IT is a great machine for riding the woods fast. Places to ride are going away all over the country, I hear it from lots of folks all over the US. Oh for the good ole days!
Hey Steve, I use Simple Green Pro, it is actually purple and safe for aluminum. Normally either the #1 or the #16 fits most of these pilot jets. You can buy the 8-piece set on Amazon, don't remember how much. I agree....think this will be a really fun project and fun bike to ride.
Hey Dale; what cleaning solution are you using in your US cleaner?? Stuff I've used, Simple Green, Super Clean, Purple Power, etc. seems to turn my carbs dark gray, then I have to buff them with the wire brush, or plastic brush on my Dremel to bring them back.
Hey Johnnie, yes, all the ones you listed are not aluminum safe, I use Simple Green PRO, it is actually purple, I pick it up at Home Depot, it never discolors aluminum and says on the container it is aluminum safe.
I would have taken off the flywheel cover and checked for rust and loose main bearings while I was in there. Probably would have been a good idea to check compression and then you would have known for sure what it was when the engine had that rattle.
Hey Jake, I am sure all the seals need replaced. There is a lot of oil laying in the low spots of the pipe. When the snow melts, I will take it out and ride it and see if it clears up. It will be coming in for a freshen up probably this summer.
All IT's were CDI even the original 1976 400. I've never seen one that even had weak spark. The 77-79 250's were incredibly tough, they used the same cases, clutch and bearings as the 400. And the transmissions were interchangable, you could put the six speed in the 400! I swear those transmissions and clutches could handle 100 HP extremely robust. I've pulled ones. All the transmissions I've seen look like new still! These bike were made very well. They also were all six speed except the big bores!😊
Thanks Luke, I really don't know that much about them. This is the first one I have owned. They sure seem well built and ready for the trail.
absolutely love these bikes from the golden era of dirtbike freedom machines.
Yes, they are Michael, freedom machines, for sure. Exactly what I thought of my first one at around age 12. My parents couldn't get me off of it.
Funny at my age I still get excited when you pull the plug and there is spark , Love it Dale !
I know me too, guess we are just easily excitable.
An IT Yamaha! Cool! Haven't seen one in decades. Another awesome video.
Hey Jim, yes, they are still out there, really good purpose-built bikes.
I have a 1977 IT 175. Mine sounded loose as well with 2000 miles on the odometer. Did a leak down and compression test. All good. Put a new ring for good measure. Piston and cylinder were in spec. Good bike. Fast for the day.
I think your right, seems like I have heard they are noisy. Will be taking a look and measuring the bore and piston in the future, then we will know for sure.
That’s a good looking IT. I had the 490 and it was a great woods bike. Tons of torque and top end.
You have one fantastic performer there. The only differences between the E and F model of any measure were rake pulled on to 28 degrees from 29 and slightly raised ports to increase mid range. Makes no difference to most people. Outstanding trail bike for under 200 lb riders and it actually goes like a train on an Mx track .
Just learning on this one, first one I've had. Seems well built like all the Yamaha line, just needs freshened up, I think.
My first bike was a 81 IT 250 loved that one. That’s one I would love to have back.
Ah ha, you have owned a Yamaha.....good for you, my friend.
Nice trail bike for the woods. Sounds like and looks like stuck rings. I used to work for Flemington Cycle in NJ . They used to sell Yamaha and Hodaka . The IT was the only blue motorcycle in the shop. Good luck, there a lot of fun.
Thanks Bruce will be checking the clearance soon, that will tell us for sure.
I had one of the first ones to be sold in CA. Loved it, best single-track trail bike of the time. my first mono shock. after a little adjusting, port matching, and installing fiber reeds the bike even performed well in the desert trails as long as the hills weren't too steep and the sand too deep. You just can't beat a 215-lb bike. Wish I could find a 200.
Thanks Dale for all your hard work !
Thanks, Murr, not work at all, just fun around here.
Berryman Chem-Dip Professional Parts Cleaner works great for cleaning carbs. Disassemble as you did, soak in cleaner, rinse with water and spray with WD-40! I've cleaned hundreds this way.
Great find Dale. I don't think I've ever had one that I got started that easily. Minor carb issues have to be assumed as a minimum on these old things.
Hey Jack, this is the easiest by far in a while. Yes, you can always count on carb issues.
Off course its gonna run Dale,its a Yamaha!
Keep those 2 stroke video's commin,i am in yamaha 2 stroke heaven 🥰
God bless you Dale and the good old US of A !
Greetings from Holland
❤🏍🇺🇲🙏🏻🫡
Thanks for stopping by Tommy, two strokes is what I do, they are fun and affordable. Thanks for all the kind words, and for following the channel, I sure appreciate it.
I'd love to see you do a video on carb tuning. Especially for altitude.
Good idea Evan will have to work one in at some point, it is not a short or terribly fun thing to do though. Very time consuming unless you just luck out. Our altitude is about 3400 feet, here at the house, much higher in the high country.
I'm at 6000 in Cheyenne and tuning the DT2 @@montana2strokeracer
Yep you guys are a lot higher used to live there and Denver both. Air force guy. Tuning will have to wait here, over 12 inches of snow on the ground for the last week or so. No good warm up in sight.
Bought this exact same year 1978 IT 175 in November. Rolling chassis with most parts in boxes. Only 2800 on speedo but already +1 over on cylinder. Rod had snapped so far from a quick start up on this one. Fun watching you getting yours going. Always enjoy your videos.
Thats cool Dennis, these things take a lot of time and its just not good to rush them. Nice to hear someone working on the same bike. Good luck with your project.
Good Morning Dale, nice work on the bike! I am going ahead with the upgrades on the 74 TM's as originally planned. I should be finishing up with the 71 TM's this week. Feeling a bit better for the moment.
Glad to hear you are feeling better David. Nice to know your pressing forward with the mods, its good for you and for the bike. Keep up the fight!
Another great video Dale! One of my all time favorite bikes…
Thanks Rob, and thanks for the manual, I am sure it will come in handy.
Thanks Dale, another excellent video. That's a great little bike. Looking forward to seeing how it comes along (as well as that F7).
Cheers, Peter.
Thanks Peter, lots going on in the shop, just keep missing parts I thought I had. I need a better system.
thats a great buy dale dosant look abused get it ripped apart will make a great machine keep up the great work
Nice bike! Very complete and in decent shape. I have a 1980 model with a torn up seat - yours looks like new. These are great running little bikes that are a lot of fun to ride. It's funny while I'm watching the carb work, I'm thinking I'd put a dab of oil on those threads and next thing you know you're reaching for the bottle. I freshened mine up with an oversize piston and rings. Also put in a new crank assembly - I think the rod play was out of spec. Anyway, I'll be watching this one. May get some ideas for my bike.
Thanks, yes it really is in good shape for its age, good prospect for a freshen up. Yeah, I think it's a good idea to lube the threads a bit. Can't hurt right. Will be getting in to the engine to check clearances and such at some time in the future. This one will be torn down to the frame and painted and reassembled. Should be a fun project.
Nice one Dale. Running, complete and clean stuff pays. Save the nut and bolt restorations for your own collection where time doesn’t matter as much.
Thanks Dave, not really into the nut bolt thing anymore. Just too expensive. This is going to be a fun project, may even ride it by summers end.
That's a nice one, the IT range was available here, the 465 was popular. I agree the freshen up route is the way to go, it's in very good shape as it is.
Best wishes, Dean.
Thanks Dean, I remember them from the day, but this is the first one I have owned. It really looks like a well-built machine.
I would love to have that. I’ve had a couple of DT1 250s and loved both. I do have an engine that I was told was a DT1’ 400 no serial number. Never had them. Have you ever heard of that? I need the cover with the clutch adjustment in it. Thanks for sharing the time in your shop.
Hey Ron, these are nice bikes, they do handle much better than the DT's. I have never heard of an engine without a serial number, but hey what do I know any how. Stranger things have happened. You should be able to find a cover on ebay or one of the forums I would think. You bet, stop in anytime, got lots of stuff going on.
I have a 1982 IT125 and a 1978 IT 250. It's normal for them to make rattling sounds like the piston is about to break free. Great bikes from a great era.
Thank you for your comment, I had heard these engines were noisy. I will be going through the engine when I start this restoration, so we will see what the piston clearance is. Your right, these are wonderful machines, this one runs very well, I have ridden it on several rides.
Nice complete bike. That will be a great fixer upper. Actually a restore.
I think so too, hope you follow along.
Always liked the IT series, wanted a IT175.
I understand what you are saying about nut and bolt restorations. OEM parts are very expensive and used are getting out of reach as well. Unless it is a bike that you had from your youth and want it back to original, your best bet is to get it running and safe, then go out and enjoy it!
Totally agree Pete.
Back in the 80's these were some of the most sought-after two stroke dirt bikes, I love all the IT Yamahas and the 465cc was a monster!
This bike is in pretty darn good shape, and I think worthy of a full restoration series Dale, you can sell that thing easily once restored.
I think you are correct, those engines did have that pinging more so than other bikes. I would say it needs new piston and rings with a honed cylinder
Hey Dave, yes, this bike will return to the shop at some point. I have got a complete new set of plastic for it and have been collecting parts that I know it needs, will have to take the top end off to measure. I have heard also that they are noisy. But I bet it will need bored, it really does run and ride well, have taken it out a couple times, it's a great machine, and will receive some TLC in the future.
Hey Dale Really fancy an IT460 as my next restoration that sounds like you said loose maybe had a sieze.
I have a 78 DT400MX and a 78 DT175MX but really would go for an IT next
19:00 Dale, you have to remember that if all you have is a hammer then sooner or later everything else starts to look like a nail! 42:54 I agree with you, it sounds like its had a hard life, I bet by the time you've finished with it it won't sound like that!
I like that, everything starts looking like a nail......will have to remember it. Yes, we will be checking the bore and piston soon to see what clearance is there.... that will tell for sure.
that ex system would be great with a alloy end can, nice project.
Hello Dale, I have a 1980 Yamaha MX 175. It look similar to your blue Yamaha. Would you share with me where you find OME parts for that Yamaha? Myron Davis
Hey Myron, yes I order new parts from rockymountainATV/MC.com or you can get them from your local Yamaha dealer, used parts come from ebay or local motorcycle salvage yards.
Not much compression could tell when you first kick it. Duck tape on intake probably has cracks but doesn't really mean leaking. Those have aluminum crank bearing inserts that come loose and act like bearing has play. I just had a 77' in few months ago I did that both inserts were loose.
She sound a little loose . but runs great Dale ! Have not seen one of those in a long time .. 👍👍
I traded a 74 MX250 for a 1978 IT175. Not as much power, but much better for the woods and a good bit lighter. I would probably still have it, but places to ride around here pretty much disappeared.
Hey Ed, yes the IT is a great machine for riding the woods fast. Places to ride are going away all over the country, I hear it from lots of folks all over the US. Oh for the good ole days!
Nice ford in the back. I have a 79 it all original.
That will be a fun bike Dale. What do you run in cleaning tank and what size screw driver do you use for the pilot jet? I can tell it's a Forster.
Hey Steve, I use Simple Green Pro, it is actually purple and safe for aluminum. Normally either the #1 or the #16 fits most of these pilot jets. You can buy the 8-piece set on Amazon, don't remember how much. I agree....think this will be a really fun project and fun bike to ride.
Thanks again Dale. Great video.
Thanks Jeff, another fun project coming.
I Know that Model well ,they a bit noisy .It will still go well they have an amazing mid range .
Thanks Clayton, that is what I had heard also.
Hey Dale; what cleaning solution are you using in your US cleaner?? Stuff I've used, Simple Green, Super Clean, Purple Power, etc. seems to turn my carbs dark gray, then I have to buff them with the wire brush, or plastic brush on my Dremel to bring them back.
Hey Johnnie, yes, all the ones you listed are not aluminum safe, I use Simple Green PRO, it is actually purple, I pick it up at Home Depot, it never discolors aluminum and says on the container it is aluminum safe.
I would have taken off the flywheel cover and checked for rust and loose main bearings while I was in there. Probably would have been a good idea to check compression and then you would have known for sure what it was when the engine had that rattle.
Yep, all in good time, this was just a will it run and intro to the bike. Will be doing a freshen up on the whole bike in the future.
bronze medal is sort of good isn't it?
With stock gearing on pavement it would do 70 MPH.
Every tool is a hammer, unless it is a screwdriver and then it is a chisel! 😂
Is that duct tape around the intake manifold?
Yes, I have a new manifold, when I do the freshen up, I will install it.
Neat
Looks like gearbox oil being pulled through the crank seal.
Hey Jake, I am sure all the seals need replaced. There is a lot of oil laying in the low spots of the pipe. When the snow melts, I will take it out and ride it and see if it clears up. It will be coming in for a freshen up probably this summer.
its time to pull the exhaust pipe and look at the piston and bore
Yep will be doing that at some point to check the clearance.
Dale "Trail Wizard" Sweger 🤔😉 🛵
Ha, ha, ha....thanks buddy!
Kytkinlevyjen vaihto uuteen tai uusiin.
IT IS that enduro SUZUKI TSX 125ccbut old.
😊
👍👍👍👍👍👍👍👍👍👍👍👌🏍🚀
loose a few brain cells no big deal when your enjoying a old 2 stroke.LOL
What a way to go.
Here
😂😂😂😂