New life to the 1978 Yamaha DT175
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- čas přidán 27. 08. 2024
- Time to breathe some new life into this 42 year old bike. I’ve noticed a loss of compression when kicking it over, loss of power and just overall running rough so I figured it was time to pull the head and give the bike a good ole tune up. New piston, rings, hone the cylinder, clean the carb, oil change and a few other pieces to get the bike running strong again.
Thanks for sharing. Brings back memories. I had one when I was a kid. I rode the heck out of it without ever a problem (That I can remember) I just used cheap oil from the parts store in the injector system back then. I hindsight I probably should have used Yamalube or something good.
The bike I learned to ride when I was a teenager. Amazing old bikes
Had one of these when I was 16, had a blast on this bike.
I learned how to ride on a 1977 DT 175. Enjoyed Hillclimbing and riding Trails.
Just picked one up today (1978 DT175E). Looking forward to getting everything unseized and rebuilt to hear this baby purr once again! Engine is not seized but the brakes, carb and everything else is. I'll do a top-end rebuild as one of my first stops. Thanks for the video.
Been looking for one of these as well! How many miles on the bike? Whats a good price for these?
Learned to ride on one of these bikes
You can find old service manual online to learn specs and tolerances. The Yamaha oil injection is designed to use Yamaha Yamalube 2 cycle oil. If not You may use twice as much. 77 MPH WFO.
Cool video!
Iv owned around 8 of these single shock ones had one i put on a 1979 yz 125 frame and used the yz pipe and carb ran like a yz but with bottom end had one rings got so thin had to roll start i had a piston with a hole in it but rings were good put threm in it ran forever
You probably could have just honed the bore and slapped some new rings on it.
What front & rear fenders are those? Acerbis universal?
Yea the front is just a universal. Rear is still original
So I have an 81, and noticed I'm getting oil on my spark plug, took the head off and noticed the piston ring seem to move around a bit, is that normal? I too have alot of carbon build up. I've been having the same symptoms as mentioned. Running rough, hard to start. Any recommendations?
Your jetting is too rich. The oil on the spark plug, running rough and hard to start are all signs your jetting is off. Piston rings are supposed to move when they don’t have pressure pushing them together.
@@battlebornmotorsports8491 Awh ok gotcha. So then this is more a carb issue then .? (Little new at all this). Is this something I adjust with the pilot screw then? Or do I need to replace the jet needle itself?
Yea, definitely a carb issue. I’d play around with the screws and maybe adjust the clip on the needle so you get less gas in. Fortunately the carbs are easy to work on but jetting is a science haha. Look around on forums and see if you can find the correct jetting for your elevation.
2 stroke or 4
I realize this is an old question but for the benefit of others...this is a two-stroke. The give-away is no valves overhead when he took it apart. Also, look at the channels in the cylinder walls, 4-strokes don't have those.