Think it might be possible to fit this engine into a CRF450 frame without cutting out the engine cradle. Instead, would try to modify/clearance the left-side of the engine-cradle tube and then maybe
cut out the horseshoe-shaped tubes overhead. But this project has been on hold for a little while. Am going to ride up to Fremont tomorrow to talk with Curt at BTR moto
about building an all new custom steel main frame. Never wanted to build an aluminum-framed trailbike, but was going to hack this together using what I had laying around because all my tools are in storage.