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Discussion Starter · #1 ·
Hey everyone I just picked up a mx yfz450 with a fresh motor. It has a 13.5:1 piston in it now but race fuel in my area is a real pain in the ass. I am looking for a great condition 12.5:1 or lower piston someone is willing to trade. Thanks, Chris
 

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Discussion Starter · #3 ·
What brand is it bro? You don't happen to have a picture of it do you?
 

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Discussion Starter · #5 ·
Alright sounds good. It's for a 08'?
 

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Discussion Starter · #7 ·
With the smaller displacement of my 05' motor would make yours a 12.8:1 I believe, and that would be pushing it a little past the comfort level to run pump gas. The two have different strokes. Sorry man, think I will pass. Thanks for the interest. Chris
 

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Discussion Starter · #9 ·
QUOTE (K&K Motorsports @ Feb 11 2009, 06:49 PM) index.php?act=findpost&pid=745385
You can change your head and base gasket to a little thicker one and lower your compression as well instead of having to get a new piston.[/b]
Do you have any idea what size gaskets I would have to run in order to drop mine down to 12:5.1?
 
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