I bought a 93 RM250 recently which sometimes won't engage gear. To be more specific - I can move the gear lever and it feels like it is engaging (slight jerk) however no drive when release the clutch.... If I roll the bike forwards abit and press/depress the clutch it engages! Once I manage it to engage and take off all other gears are OK!
Have you guys had any of the above sympomts on you machines - what is the most likely cause?
check that the clutch isn't notched. grab the clutch basket and try to move it up and down to see if there is any movement which indicates bad bearings