I have found that the 250X piston made by Wiseco is offered in a higher compression than the piston that 300EX piston. Remember though, the 300EX & 250X bore sizes are the same. Wouldnt the 250X piston work with the 300?? Anybody tried this?
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250X High Comp. Piston
I have found that the 250X piston made by Wiseco is offered in a higher compression than the piston that 300EX piston. Remember though, the 300EX & 250X bore sizes are the same. Wouldnt the 250X piston work with the 300?? Anybody tried this?
2004 Yellow 400EX
Pro Wedge 2 tires on ITP alluminum Rims
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AOL IM Name:stevengates45
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the bore sizes arent the same, the 300 is 6mm bigger than the 250, that makes the 250 a 68mm, and the 300 a 74 mm, i think
kc
Ride Red or Ride Home
nope. only thing different with the 300ex & 250x is the rod length
2004 Yellow 400EX
Pro Wedge 2 tires on ITP alluminum Rims
Ride Red or Ride Home!
RacingCentral.itgo.com
AOL IM Name:stevengates45
Sick Style ATV Racing
250x and 300ex have the same bores, just the 300ex is the stroked version of a 250x.
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I don't think it will work. The piston height will probably be different and may cause valve/piston clearance problems or the piston may sit lower opposed to the 300ex piston lowering the compression anyway. I wish Wiseco made a lower comp. piston than the 12:1 ...it's not practical for me.
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Wiseco's pistons are mostly 11:1 i believe, and on moto-man.com im pretty sure they sell some 10.5:1
kc
Registered User
When I looked in the Wiseco catalog they showed one piston for the 250X and it is a 12:1 piston, and unfortunately that is the one I have. I may look into what JE has to offer.
TRX 450r
Polaris Pro X 700
Polaris Edge 600
'85 Polaris Indy 600 SE
'69 Cutlass (mine when I was a kid)
'71 Vette
'70 BBC Monte carlo
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