starting problems 250txc 2010

hi every one new to ch hope someone out there can help me

ive got a hot starting problem with the txc.when the bike has been ridden hard for 20minutes or more the starter refuses to turn the engine over even in neutral with the clutch in,if the bike is left to cool for 5 mins it works fine.ive had a new battery and starter motor fitted starter gears,and valve clearances checked.
if the bike is left standing to warm up untill the fan cuts in it starts every time even in gear?

Can you hear the starter motor strain or nothing at all? I noticed I have a problem with the starter button itself, like there's dirt in the switch housing or something.

the starter trys to turn the engine over but can,t clear the compression stroke

I think I read somewhere where there's a "recall" for the autodecompressors for the new 250's already out in Europe... not announced yet in the US. Wonder if this could be your issue?

Hi Foz

If you've had all the starter mech and battery replaced then the next step would be to check the auto decompressor is working correctly. Your bike is still under warranty so pls get your dealer to talk to us.

Cheers...Dave