Hi all,
Having issue 07 KLX250s. I notice when releasing clutch I feel a noticeable vibration, shuddering through bike, also feel it when releasing clutch while downshifting. No slippage felt at all. Bike has 8000 mi. Running Shell Rotella T6 oil. Any thoughts

 

Sounds like something is loose, sprockets, wheel, motor?

 

Sounds like it could be chatter. Some clutch friction material can chatter when friction modifiers are added to the oil. Make sure that the chain and sprockets are in good condition-no binding links in the chain. If that looks good and it's just the regular Rotella diesel oil, then I would be prepared to look at the clutch plates for signs of slipping/ hot spots/ blueing. With the cover off, inspect the hub and drive gears for any defect/ looseness. I would strongly suspect the clutch pack as the source of the problem.