ok i know this has been asked before...

[Chanman420q]

whats compatable with the 450r and the 400ex. my friend just got a 450r and its amazing. so im sold, i want a 450. now im leaning tords the yfz, but if i can throw almost all my after market stuff from my 400 onto the trx450 im gunna get that so im not starting at ground zero.

[WOracing]

the only thing i know of is the front bumper....i hear stories about the nerfs but my AC pro pegs didnt fit

[lilredridenwood]

Your K&N air filter will fit, and the bolt pattern is the same for the wheels. After that I dont have a clue, but everything I have heard is that it is a totally new bike!

[SRH]

the guy i sold my rpm swingarm off my 400ex to ended up putting it on his 450r

[lukester720]

Handlebars, killswitch, I have heard someone on here say footpegs but I'm not sure.

[Sportrax10]

Correct me if im wrong, but I think the Axles are...

[WOracing]

Yes i also heard axles

[Silverfox@C&DRacing]

the footpegs are interchangeable,the axle is with a spacer, rear sprocket,

I have tried the 400ex dgnerfs,acnerfs,acpropegs they don't fit

[thump4863]

my pro armor nerfs from my ex fit my r