yz450f bottom end

2 replies to this topic
  • moto278

Posted April 04, 2011 - 08:26 PM


i was just curious with the new yz450f (10-11) is the bottom end the same as any previous models? if not what changed for the new bike?

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  • grayracer513

Posted April 04, 2011 - 10:22 PM


No, it's not. The transmission and clutch is the same as the '06 and up, but just about everything else, including the crankcases, obviously, is different. The crank is different, and the bore center line is offset forward to reduce thrust loads and allow better power production at high RPM while still keeping the rod short.

  • moto278

Posted April 05, 2011 - 04:23 AM


thanks again gray! pretty much exactly what i was lookin for

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