new to me 450


4 replies to this topic
  • lumpy790

Posted November 14, 2010 - 05:48 AM

#1

Its far from new but......I picked up a 08 yz450f basket case that had the clutch basket shatter. Cases have been split and everything cleaned out. They included a good clutch they picked up on feebay. But the cylinder has a ring around the top where the piston was so worn it was rocking.

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Is this cylinder wear a common thing on 450's? Will it run with it like it is or should I get a new one or replate?

Might need a stator too as someone must have thrown something in the box and chipped the coating. I will re-seal it with some epoxy 1st and see if it works before buying a new one.

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  • crf450319

Posted November 14, 2010 - 07:39 AM

#2

That cylinder is shot, you'll more than likely need to replace the piston/rings/pin as well. A new OEM cylinder is $238 from ServiceYamaha.com, so the old one isn't really worth re-plating.

Good luck !

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  • kx250fnick

Posted November 14, 2010 - 08:09 AM

#3

Yeah,that cylinder is toast,wear on 450's depends how you ride them,just like any other bike.

  • grayracer513

Posted November 14, 2010 - 08:34 AM

#4

A new OEM cylinder is $238 ... so the old one isn't really worth re-plating.

OTOH, it would be a nice core for a 470 kit.

  • lumpy790

Posted November 15, 2010 - 06:43 AM

#5

No big bore kit for me......staying stock. Probably going with OEM piston too.





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