CRF150R Chassis to XR/CRF100 engine mount swap kit.
This billet aluminum engine mount kit places your XR-CRF100 air cooled engine into a CRF150R chassis. This makes it “mad dog” and “trail bike” class legal. The kit includes 2 lower rear engine mounts that need to be welded in. Then simply cut your factory engine mounts off of the 150R frame and bolt this in.