hey guys, a mate of mine recentlly bought a 91 RMX250 that was in a real state to say the least!
i stripped it down for him and replaced the crank bearings and seals and put a rod kit and top end in it.
we did 110km trail ride last weekend and the bike was really smokey and at the end the bike had no gear oil!!!
we filled it up and ran it for a few miutes( very smokey)
drained the oil and only 200ml came out!
i started it up again took the oil filler cap off and and it has positive and negitave air preassure with the stroke cycle, wich would indicate to me a crank case leak???
and the crank case is sealled propperlly.
my main question is.....
on the clutch side, the crank seal has a steel collar that slides
over the crank and into the crank seal, but on the crank it is steel to steel, how can this be a good seal???
was there something mising???
any ideas???