Hi, great forums. Been reading for a long time but this is my first post.
My 2002 rm 250 appears to be burning gearbox oil. I rebuilt the engine when I bought the bike. New crank bearings and seals. I recall at the time that the right side bearing taking much less effort to press in than the left.
These bearings and seals have around 8 hours on them. I’ve stripped and split the motor today and the seal looks fine. The right side bearing however came out on the crank and after removing it from the crank realised I could push it back in its hole with very little hand pressure. Could this have caused oil to be sucked through the seal? I plan to use a retaining compound on the bearing.
The other thing I’m curious about is how snug of a fit should the primary gear bush be inside the seal? I mean it takes a little push to get it through the seal and onto the crank splines but I’m second guessing the strength of the seal around it at this point.
Any pointers, advice or pity will be much appreciated.
