Does a piston of YZ450F fit into YZF450 quad?

2 replies to this topic
  • Kasjok

Posted December 08, 2009 - 11:14 AM


So can I run dirt bike piston in a quad? I would think yes, but Yamaha has different part# for them.

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  • grayracer513

Posted December 08, 2009 - 11:20 AM


It may depend on the year of the quad engine. Those made earlier than '08 were 439 cc engines with a shorter stroke and an externally oiled top end. The '08's were 449 cc engines.

Ask in the quad forum.

  • usp4u

Posted December 08, 2009 - 12:04 PM


definatly need to know the year first. on the short stroke engines the hot set-up has been to drop in a WR rotating assy & piston to make it a 449cc. Heres a good source with some knowligable YFZ riders who do this alot...

you'll see they refer to the pistons as 18mm(long rod wrist pin diameter) and 20mm(short stroke wrist pin dia.)

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