426 piston


7 replies to this topic
  • randytbo98

Posted April 21, 2009 - 10:32 AM

#1

yz 426 trying to decide on a piston. which brand? 13.5 or 12.5? would i benefit from the higher ratio for a trail/gravel pit bike?

  • davidl9999

Posted April 21, 2009 - 10:36 AM

#2

13.5. Those will still run on pump gas. I don't have a brand preference although I generally go OEM for internal parts when possible. (obviously that's not the case here).

  • randytbo98

Posted April 21, 2009 - 10:49 AM

#3

im looking at a je in the tt store. will they go in without having to change anything? are they worth getting??

  • davidl9999

Posted April 21, 2009 - 11:02 AM

#4

I'd expect it to go in without changing anything mechanical. Definitely will need to go through the jetting routine when you're done (might want to check with JD for a kit). At least make sure the cylinder bore is straight and true and the plating is good and honed for the new ring. JE has a pretty good reputation. Never used their pistons myself.

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  • randytbo98

Posted April 21, 2009 - 11:06 AM

#5

its gonna be slid into a brand new oem cylinder with a hotcams ex cam

  • 426 NOOB

Posted April 21, 2009 - 12:43 PM

#6

its gonna be slid into a brand new oem cylinder with a hotcams ex cam


go for it.

  • grayracer513

Posted April 21, 2009 - 02:29 PM

#7

I like CP pistons, but JE is also excellent.

  • 642MX

Posted April 21, 2009 - 08:04 PM

#8

yz 426 trying to decide on a piston. which brand? 13.5 or 12.5? would i benefit from the higher ratio for a trail/gravel pit bike?


Get yourself a Wiseco 13.5:1. I had one and loved it. :banghead:

I don't think anyone makes a bad piston, but I've used Wiseco's for years with great luck.





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