ty250 86

[Michael21]

I just bought a 1986 yamaha ty250 and this is my first time riding a trial bike, in my experience with many 2-stroke bikes, I find them very strong at the initial throttle, easy to wheelie, but on the ty250 i just bought, in 1st 2nd 3rd gear it is not strong, it just keeps slow speed, can't even do a wheelie, is that normal or is there something wrong with my bike?

[feetupfun]

1 hour ago, Michael21 said:

I just bought a 1986 yamaha ty250 and this is my first time riding a trial bike, in my experience with many 2-stroke bikes, I find them very strong at the initial throttle, easy to wheelie, but on the ty250 i just bought, in 1st 2nd 3rd gear it is not strong, it just keeps slow speed, can't even do a wheelie, is that normal or is there something wrong with my bike?

Your statement "this is my first time riding a trial bike" tells me that the bike may be working normally, because 2 stroke trials bikes like your TY mono are very different in engine performance and gearing to 2 stroke non-trials bikes.

How about you post up a link to a Youtube video of you riding your bike so people can tell you if there is anything wrong with the bike.

[mcman56]

You may be missing the hit or "coming on the pipe" of other type two strokes.  Trials bikes mostly have very smooth torque curves so don't tend to do that.  IIRC, that particular model does not run to high RPMs so if you are trying to lift the wheel when you are already up in the RPM range, it may not happen.  However, It should be able to lift the front wheel.  What happens if you are rolling along at a slow walking speed in first or second gear and quickly open the throttle most of the way?        

[lemur]

You're not using the clutch, your reed valves need attention or the previous owner added weight to the flywheel would be my first guess.  The 1980's TY should spool up much more quickly compared to a 1970's TY'