Motorcycle Frame Jig Parts / Fixtures. Build a complete chopper frame, hardtail a frame, rake your bagger, etc! The fixtures are for sale individually or can be purchased in a kit to save money and fabrication time. With a Chop Source frame jig kit you could have your motorcycle frame jig assembled in just a couple of hours. Download the Chop Source Frame Jig Plans / Assembly Instructions (revised Dec-17-2018).