450 vs 250 engine?


4 replies to this topic
  • rcrob

Posted December 18, 2010 - 06:31 AM

#1

What are the engine dimensional differences between the two different sizes? Do they share cases and are somewhat interchangeable assuming they are the same year or are they completely different?

  • rcrob

Posted December 19, 2010 - 08:25 AM

#2

Anyone? Does anyone know if I can put a 250 engine in a 450 frame or vice versa of similar years (not that I am going to) but I would like to know if the mounting points and physical size are similar. Surely someone here tunes on enough of these things to know.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • c_dasilva127

Posted December 19, 2010 - 09:19 AM

#3

Mount holes are most likely different. But it is metal, so fab work is always possible. If you're not going to do it, then why did you ask? :excuseme:

  • rcrob

Posted December 19, 2010 - 09:22 AM

#4

Mount holes are most likely different. But it is metal, so fab work is always possible. If you're not going to do it, then why did you ask? :excuseme:


I have a reason.

  • KJ790

Posted December 19, 2010 - 11:06 AM

#5

Completely different engines, cases and all. Pretty much nothing is interchangeable between the two other than spark plugs.





Related Content

Forums
Photo

YZ450F 03 Sparks driving me crazy by SirAttard


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Forums
Photo

James Stewart back on a YZ450F by YamaLink


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

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
Forums
Photo
Motocross

Thinking about Yamaha 250... by Arctic Pride


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 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.