01 426 engine fit an 02 frame?

2 replies to this topic
  • niterider40

Posted November 21, 2008 - 07:59 PM


I would like to use an 01 yz426 engine in my 02 yz426 chassis, does anyone know if I will run into trouble?

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

Posted November 21, 2008 - 09:39 PM


I believe I remember that the swing arm bolt is a different diameter between the two. However, this should be correctable by interchanging the two steel sleeves that are inserted into the crankcases, using the '02 parts in the '01 cases. Yamaha lists them as serviceable parts.

Otherwise, the two engines should be virtually identical.

  • 642MX

Posted November 22, 2008 - 11:39 AM


And be gentle removing the steel sleeves. I've had mine out before and they distort relatively easy. I used a brass punch and plastic mallet to knock them out. Insert the punch through the case and knock them out backwards. (if that makes sense).

Related Content


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

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F

Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Michigan Motocross Tires by 288yz450

Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply

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.