anyone done a crf 250 400 ex build

[stevestauff]

i was wondering if anyone did this because ive got the motor a 400 and i also got a 300 but it just seems like the 400 would work a little better.

[stevestauff]

nobody out there has done this before?also the 300 has to have the frame rails on top moved because the crf motor is taller than the rest.