Yz 400f to 426 cylinder swap

1 reply to this topic
  • yobigjay

Posted May 29, 2005 - 07:34 AM


Since the stroke is the same (60.1mm) can you swap the cylinder and piston to turn my 400 into a 426? Are the heads interchangeable (or do I have to get a 426 head) OR, has anyone sucessfully put a yz 450f engine into a 426 (400) frame.

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

Posted June 05, 2005 - 02:51 PM


im pretty sure the cylinder heads will interchange with the 400 and 426.cylinders will as well,i think the 426 has a longer stroker though,thats where the extra displacement comes from

Related Content


Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

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

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

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On Yesterday, 06:20 PM

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 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.