help me!! lost compression!!?:(

Ok i was going down the road on my 2006 TC250 in 4th gear mid throttle and the motor quit, locking up the rear tire. I was only able to bump start it. Wont kick start. it feels like it has half the power. And an odd new sound. Plus the clutch feels toast it wants to go with the clutch engaged. Before all this happed i put in gas that i know now had some water in it could be the culpret? Or did i go to far in between oil changes?

what ever you do... don't run the engine anymore until you determine what is wrong.. you could make things much worse as in $$$

yeah tomorrow im gonna look at the valves clutch....someone said that i prolly burnt the rings? this right?

Sounds almost like a timing chain skipped a tooth, unless autos are different from bikes. I would call the local shop and ask some questions. But really, don't try and start it untill you get some kind of clue as to what it really could be.

bushing let go in the clutch basket?

The part about the engine quiting in 4th gear and locking up the rear tire does not sound good.

to start, pull spark plug, examine.

with bike on a stand and spark plug out slowly turn over the engine by putting it in gear and turning the rear tire by hand.. listen for unusual sounds and determine if there is any abnormal resistance. If resistance is felt, take out of gear and slowly turn the engine over with the kick start checking for unusual noise and resistance. DO NOT FORCE the motor to turn over if it doesn't want to turn...

drain oil and remove oil filters while checking for odd debris in both


those are a few starters

Thanks Guys!!
and this all happed 20 mins after start up btw.
ill be back with my findings soon lol

the valves are fine,
its the piston and cylinder that are messed up
so would it be cheaper to buy the 300 kit from motosport or find a piston somewhere? and have a local shop do the cylinder?

It depends on how bad the cylinder is damaged. But now is certainly the time for the 300 kit! You definitely want to inspect the connecting rod for damage. Good Luck. TW

+1 I'm not sure I trust the rod again after that, unless there is a way to accurately verify it is still in spec.

Yeah the piston is toast but i need a place to send the cylinder.
Any suggestions would be awesome because its almost spring!!