13.5-1 piston on pump gas?


5 replies to this topic
  • GBC

Posted June 11, 2007 - 06:55 PM

#1

Will a 13.5-1 piston run on pump gas in my 2000 426?

  • 642MX

Posted June 11, 2007 - 07:10 PM

#2

Of course it will, but it may ping. If you hear it pinging then you need to blend some race fuel with pump fuel.

  • GBC

Posted June 12, 2007 - 07:22 AM

#3

Well I dont want to run race fuel at all. I know we can run 13.5 pistons just fine on pump gas in the crf450 but I was wondering if the 426 can do it as well.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted June 12, 2007 - 07:49 AM

#4

Under most circumstances, yes you can. Only if the engine is lugged hard at a lower rpm will it ping on reasonably good pump gas.

  • whyzee426F

Posted June 12, 2007 - 08:05 PM

#5

...so how much actual benefit is there to running a 13.5:1 piston?

  • 642MX

Posted June 13, 2007 - 09:30 AM

#6

...so how much actual benefit is there to running a 13.5:1 piston?


Increased torque from idle to mid-range. They don't do much on the top end, but from the bottom thru the mid range they rip. I wouldn't rebuild my motor without one. :thumbsup:





Related Content

Forums
Photo

05 yz450f not fast enough by RedeyeYZ


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies
Forums
Photo

Is it worth it? (Cam and High compression piston) by macgi77


Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies
Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

Should I buy this bike? help....... by Numsa Hul


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.