cough and sputter at 3500 rpm
 

I have a 1988 xt600 and at 3500 rpm and above I get a bad cough, sputter or misfire. It seems worse under load as going up hills. Where should I start to sort out this problem? Thanks Albert

Replace air filter, it will probably be closed by dirt.

Auke

It could also be a partially blocked main jet in the carb,or the valve clearances have tightened up,if it isn't the air filter as pointed out above.

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Just going for a short ride on my bike....

Just curious has servicing the air filter improved the sputtering situation? While the filter is the mostlikely cause, there are a few more things to check if you are still having trouble.

winmac

I put a new air filter in last weekend but I have not taken it out to try it ill post when I do. This is a new bike for me and I just want to sort out some of its problems. Thanks Albert