Cylinder uppgrade


2 replies to this topic
  • Oxen

Posted September 25, 2004 - 07:49 AM

#1

I want uppgrade my YZ400F 1998 to 450cc or 500cc.
Does anyone knows if thats possible?
Which company sells the cylinder?
Can i fit a 426 cylinder on my bike?

/Jörgen

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • hontrx265r

Posted September 27, 2004 - 02:53 AM

#2

Its alot of work and a fair amount of cash but you can use a 426 cylinder with a 2mm overbore and a 2mm stroker I recommend powroll, this will bump you up to a 467 some where in there I forget, but its killer not all that reliable though.
You could probably get a 426 cylinder that is overbored for cheap from one of the quad guys makes it a 440 I bought mine for 100.00 bucks put a post on atvscene.com

  • Rich_Rohrich

Posted September 27, 2004 - 09:34 AM

#3

I want uppgrade my YZ400F 1998 to 450cc or 500cc.
Does anyone knows if thats possible?



You can use a 2mm overbored 426 barrel and 97mm piston (Wiseco or JE) to get 444cc. You will need to rebuild the crank with a 426 rod to accomplish this due to the larger wrist pin on the 444cc piston. Rebuilding the crank with the 426 is a good idea in general on these old 400 motors. The rod was the biggest weakness in an otherwise fantastic motor.





Related Content

Forums
Photo

First Hare scramble tips by dhend8


Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  33 replies
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 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.