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Message: [QUOTE="whenfoxforks-ruled, post: 1398411, member: 73147"] Are you the type of person, lucky enough that 1 grain of metal did not tear up the bottom end, or yet? You inspected the big end of the rod, and bearing with a light and magnifier? And you feel confident that 1 grain is not sitting between the seal and main crank bearing? Just waiting until the motor goes over 12,000 rpm before it comes out? All for the price of popping the cases apart and changing 2 bearings, 2 seals and put it back together? Never done it before? There is no time specific, that the bearings and rod go out at, its more maintenance and knowing when you are pushing your luck. You did learn about Kawasakis' crappy plating! Anything out of spec on the rod, or the cage, or bearings look odd, change it also. The big end is a lot easier to check out of the engine, not impossible. Thrust washer clearance and up and down are the most important, aside from careful magnified inspection. Anytime you loose the top end, the debris likely ran through the bottom also. Nothing like a tight 2 stroke. Less rings, shorter top end life. I would be guessing 5 to 7 hours, and just change the piston also? Which happened first, the ring went or the plating? My guess is the ring. Vintage Bob [/QUOTE]