!995 Specialized Ground Control w/ SBP heavy duty jackshaft. Motor is a GT-5 ported for low end power. Some pointers.... Get the chain tensioners! The main drive chain is crucial because it puts a 3rd bearing on the driveshaft. All mounts have elk leather to protect aluminum frame. Thinking about lowering the gearing cause I can only get it into 5th gear @ 45mph. (9 gears total.) Thought about a reed, but space is very limited. Might change out motor to PK-80 for more torque. . The low end is amazing! The jackshaft is a total game changer! Totally worth the price! Not for the faint hearted though. This is my 6th build, and the best!