426 to 450 carb swap?

6 replies to this topic
  • zaxcar1

Posted June 10, 2013 - 03:09 PM


I had once read that useing a 450 carb on the 426 helps with hard starts and makes them run better. But i cant remember what year 450 carb was the best to use and what might have to be done to get it set up? thanks

  • sid_125_04

Posted June 10, 2013 - 04:37 PM


I'm sure grayracer will reply but I asked this and an 08 is the best I put one on mine just make sure you get all the cables with it ,throttle and hot start cable, relocates it to clutch so ill have to get the perch with hot start. I got to take mine a short spin before my radiator started leaking and it was very noticeable.

  • zaxcar1

Posted June 10, 2013 - 04:59 PM


i do have the hot start there already

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • sid_125_04

Posted June 10, 2013 - 05:46 PM


Ok then the cables should be the same but still get one with all the cables just in case. Think I gave 200 for mine on eBay with everything 06-08 would be the way to go

  • grayracer513

Posted June 10, 2013 - 09:47 PM


The aftermarket cable kit for 426 hot starts won't fit a 450 carb.

The best carbs are any of the '05-'09's.

  • Zeppy1311

Posted July 19, 2014 - 08:07 PM


Ok so what makes them so special. Currently I have a jetting issue maybe I can benefit from the carb swap

  • grayracer513

Posted July 20, 2014 - 07:27 AM


What makes what special? The newer carbs?  They're a more advanced design internally.  The '05 and up have an accelerator pump leak jet so the pump can be more robust without slobbering gas into the engine when it's not needed.  Much better idle and part throttle performance, starting.  Much less fussy about little changes in the weather.

Related Content


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

Is the 2016 GYTR Yamaha YZ450F too fast? by Fryboy

Dirt Bike   Special Interest Forums   Pro Racing
  • * - - - -
  • Hot  241 replies

Help with 2000 yz426 by weekend woods racer

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

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 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.