i had similar problems on my gas gas 250 11. i have had the clutch master cylinder replaced which fixed the problem, which then went again.

I replaced the master cylinder kit which fixed it and made it a completly different clutch, plenty of progressive feel and no drag. Not sure how long till it goes again - something to do with swarf or metal not quite cleaned up properly.

Thanks for all the replies. Its now apart and theres some play in the piston so i will replace that and small end bearings.

Where's the bet plce to get orignal gasgas piston from (i presume these are best?) and small end bearings plus gaskets?

I'm guessing i won't want to know the price??!

Thanks in advance, sorry im new to trials and am unfamiliar with part-shops!

Out riding today, the bike seemed to gain a slight noise from the engine, a soft tapping noise, that varied with the engine speed.

I believe its the piston, as that wass where the noise was coming from, not from the big end (im hoping its not aswel!)

I've stripped the bike apart, yes theres a little play in the piston(at the bottom of the stroke), but i am having trouble getting the 2 nut's off the front of the barrel - i cannot get a spanner or socket to fit against the barrel!! Is there a specific spanner etc to make this easier ?

And finally...i know the guy who owned the bike wsa out most weekends, as i am, but how often should a piston / rings approx be lasting ?

I am running castrol TTS at 75ml to 5L of Super Unleaded.

Thanks in advance!