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How many hours will my 300's bottom end last?

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Any where from 1-800+ depending on your maintenance, riding style, remembering to put oil in fuel, riding conditions, and some luck. I usually don't even think about cranks until around the 300 hour mark.

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Any where from 1-800+ depending on your maintenance, riding style, remembering to put oil in fuel, riding conditions, and some luck. I usually don't even think about cranks until around the 300 hour mark.

 

I clean the filter religiously, always mix gas with good synthetic oil at 50:1.. I'm a decent A rider but I typically don't rev out the bike like it's a 125, I prefer nasty technical riding which keeps the RPMs kinda low and tractable.  So by my 3rd piston at 375 hours is when the crank may need a rebuild??  We'll see and hope for the best.

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At 375 it may, but wouldn't be surprised if it was still fine. It becomes kind of a "peace of mind" thing for myself at that point. Good ridin!

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It is a big variable for sure.  The bearing cage in my 08 300 started coming apart at 375 hours. 

Edited by mmartinyz

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