ARC billet SFI Certified flywheel with adjustable timing for the old style NON "Hemi" head Harbor Freight Predator. Fits Harbor Freight Predator 212 with tin sheet metal valve model #69730. The keyway is in the stock position when the flywheel's indexed adjustable timing hub is set to the negative side of the index range. Index marks are in 2° increments which allows up to 14° timing advance from the stock position (24°-38° range). The flywheel weighs 4.05 lbs and has a super-strong rare earth neodymium magnet. Not designed to work with pull starter. Minimum coil gap .030" Torque to 65 ft/lbs