Ok so I know this question has probably been brought up a million times but id like to hear some answers for myself. I just bought a 2005 kx250f and I'm wondering what kind of oil to run in it? I've had other four strokes in the past but every bike is different. Id also like to do some routine maintenance on it the bike... What should be done? The bike is in good shape and looks to be well taken care of but being that I just bought it I'd like to freshen it up. Another thing I've been wondering the transmission clutch and engine oil is all the same right? I appreciate any feed back, ill be doing the work myself would just like to hear it from some guys who have more experience with these bikes. Thanks

 

If it's like the klx250 the manufacturer recommendation is 10W-40. I switched to synthetic (Mobil 1) during my last change. It retains its viscosity longer. Still have many more miles to go before my next change.