Boring out the jug?


1 reply to this topic
  • fitzpcj01

Posted January 10, 2014 - 02:30 PM

#1

02 yz426 curious what all I have to change to bore it out. I know the piston rings blah blah but what about the cams, or crank?

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

Posted January 10, 2014 - 04:50 PM

#2

 If you are repairing a wear condition, you cannot bore the cylinder.  There are no oversized pistons, all of them are standard.  The cylinders are Nikasil plated aluminum, and must either simply be replaced, or honed oversize and replated, then honed back to size.

 

If you want to oversize the engine, there are big bore kits you can buy that include the piston, rings, and cylinder, along with the necessary gaskets.  It is not necessary to do anything with cams or the crank that isn't mandated by some kind of wear condition.







Related Content

Forums
Photo

James Stewart back on a YZ450F by YamaLink


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

YZ450FX OR YZ450F by MESSMAKER


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 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
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo
Supercross

Wilson the Blue Privateer by jetfuel


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 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.