yz426f head on a yzf400 cylinder

2 replies to this topic
  • yz400f corey

Posted August 02, 2007 - 12:20 PM


i heard that the 426 and the 400 head is the same besides the valves the mounting holes are the same and everthing if some one could let me know thanks alot corey

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

Posted August 02, 2007 - 01:00 PM


I have a 98 YZ 400 and I put a 2000 WR head on it. The only thing I had to do was drill a hole for the hot start valve. A 426 head should be just fine as well. The valves will work too. Just that the 426 valves are Titanium. Hope that helps.

  • grayracer513

Posted August 02, 2007 - 03:18 PM


Just that the 426 valves are Titanium. Hope that helps.

The 2000 426 had SS valves. "01 & '02 were Ti.

And a 2000 WRF was a 400.

If I recall correctly, a 426 head will work, but there is no place to connect the hot start, as it is built into the 426 carb. You should be able to drill and tap for the fitting.

Related Content


Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 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

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

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

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.