Hi All, I'm new to this forum. I signed up because I'm having an issue with my 1984 ytm200L and I couldn't seem to find a thread that described my issue. If one exists, apologies for the long winded post.
I bought the trike recently and replaced the carb because it was leaking and the choke didnt work. The new carb is set to factory settings that I found on this site. There are still a couple issues that may or may not be related.
First...I can get the trike started no problem and it will idle once it is warmed up a little. Once it is running for a while, maybe 5 or 10 minutes, the idle gets weird. It will rev up then down randomly. If I bump the throttle, it will settle down into a nice idle again sometimes, but sometimes it will take a few seconds to get back down to idle. Then it will rev up and down randomly again.
Second...the piston rings are toast. I'm getting a lot of blow by but I'm not sure that could be related to the idling problem.
The diagnostics I've tried are mostly limited to looking for vacuum leaks and resetting the carbeurator (like dozen times).
I built a smoke machine and found a tiny leak where the throttle cable hooks up to the carb, and on the throttle cable itself where the plastic meets metal right near the end. This doesnt change after heating up though. I dont know if it is enough to cause the problem.
I would be interested if there were any ideas on diagnostics I could try so any ideas are welcome.
It would be even better if someone has had the exact issue and has a solution already
Any help is much appreciated!
-Eric