crf 450 motor in a lsr frame that has 426?

[QuAdEr 317]

if i bougth a quad wiht a yz 426 motor in it and it is a lonestar frame..would a crf 450 motor also fit in that frame if i remove the 426? also would i have to get a different headpipe. thanks let me know

[WKY400EX]

I don't know for sure, but I've heard that there are just a few differences in mounting. If you modify the motor mounts a little bit, it's suppose to work. Not 100% on that. Talk to MXBubs about that. About the headpipe, you'd have to get another one. Good luck.

[cooper505]

i'd say your best bet would be to call lonestar.