[Halkese]

Hey guys, wondering if it's possible to swap frames from 2004 to 2005. And what's required to do so. Has anyone done this? I've picked up a street legal 2005 frame for my 04 crf450r. At first glance
I can see a few key differences, including subframe mounting etc. Any insight would be awesome thanks!

[JimDirt]

Welcome to the site !!

About the only way you can make it work is to use the 05 subframe and motor mounts and hardware , along with the 05 tank , i believe the radiators should swap , and the engine and wheels and forks , the shock needs to be measured as the clevis may be a different length , the swingarm chain guide mount will be different as will the linkage , so what you need is most of the 05 components to make the swap feasible, so in short for 04 parts
Forks = yes
Engine = yes
complete electronics must swap with engine
Wheel sets = yes

that's about it , airbox , swingarm , tank , subframe , plastics , exhaust system ,will not swap , even the seat is different

[Halkese]

Thanks Jim, very insightful. Here's what I have: 2005
frame with engine mounts, seat, full plastics, pegs, lower triple clamp (which I've heard is slightly different as well) and full complete 2004 crf450r. So with a tank, airbox, and subframe I should be able to swap most if not all of the rest with a little fabrication? Any idea why the exhaust will not fit? You certain of the swingarm? When compared against my 05 crf250x it seems identical.

[JimDirt]

the mounts to the chain guide are different , and i believe the swingarm itself is slightly longer than the 04

It should be
02
03-04
05-07
08
09-10

etc