he had to find a good agreement between ground clearance and center of gravity!!
this is why the engine and the bottom of the tubes are so close. (Shakes, absorbed)
Remember that the chassis often used to make conversions cr500af is a 2005 CRF250, so! rear suspension, linkage and swingarm 250cr2007 after test, the agreement is better for the feedback info on traction with this 450crf02/04. The 3rd generation is also good 450 2006/2008.
for this frame, I used two examplaires