Originally posted by dino.tw
HINT AGAIN! Hope your eyesight is good.... 
MR6801 TH9/C3 or MR6801C TH9/C3 (ceramic)
It depend on the bearing condition. And the bearing life depend on the fuel that you using.
how do I tell if the rear beaing needs replacing? what are the signs? also is there anyway to tell with out taking out the bearing from the engine??
thanks Jason