Question about 2004 Suzuki RM-Z 250

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2008 rmz 250 4 stroke i was riding it and all of a sudden it cut off and now the kick start wont move but shift through gears just fine i think the top end is locked up i'm not sure could the piston of just seized up or what?

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What you can try and do is jump start it to try and knock it loose

if not you might have to rebuild the top end

Posted on Mar 26, 2011

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Remove the spark plug, put the bike in fourth or fifth gear then try a jump start but with the key turned off. If the rear wheel locks up when you jump on and release the clutch then the piston has probably seized up OR the kick start-to-clutch hub gearing is messed up. The best thing to do is to remove the left engine side cover and look at the kick start mechanism. You may need to remove the clutch assembly for a full inspection. With the clutch removed the rotor ( crankshaft flywheel ) should turn. If it will not turn then a seized piston, broken cam chain or dropped valve is likely. If the rotor does turn then the kick start mechanism is the problem. Please rate my answer. Thanks!

Posted on Mar 26, 2011

  • furman110425 Mar 26, 2011

    well it popped loose i ran it threw all the gears and tried turning the wheel it didnt turn but then i went to kick it and i guess it popped loose i kicked it over and over and i guess it popped loose i'm not real sure you can hear that the piston has compression and would anyone happen to know what the torque is on the outside head bolts on the right side of motor i need to torque them back down

  • tombones Mar 26, 2011

    I strongly suggest you find out exactly what happened. You don't really want to be riding at 40 mph and have the engine lock up on you.

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Well the motor locked up and i couldnt kick it at all shifted threw all the gears just fine but i wuz messing with it and i ran through all the gears trying to turn the back wheel and knock it loose didnt...


If you are running 5th gear mid throttle the compression in the motor wasnt enough to push the piston back down

for the record ( i run a ts 250 savage 2 stroke ) i,ve done it my self it happends

try to keep it the power band you will be fine

good luck.

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