I just bought a KX65. I had to put a water pump seal in it. Now it wants to pull while in gear with the clutch in. If you rev it up , it will stop pulling until it goes back to idle. It seems to get worse as the bike warms up. The guy I bought it from used ATF oil in it, but I put 10w 40 in it since that is what the manual called for. I have tried adjusting the clutch and it does not seem to help. I don't know if it did this before, it won't pull with me on it but will with my son on it.