Jackshaft shaft with threaded end for the Baja Motorsports Mini Bike MB200 This jackshaft is press fit between two 6203ZZ bearings on the jackshaft assembly. Jackshaft shaft with threaded end for the Baja Motorsports Mini Bike MB200. This jackshaft is press fit between two 6203ZZ bearings on the jackshaft assembly.,1 Does this jackshaft attach to the motor or behind the Motor with it’s own Mounting bracket The threaded jack shaft should not attach to the motor directly. The jack shaft assembly mounts to the shaft of the motor, and then the clutch. This shaft mounts to the other side of the jack shaft assembly, and the part number for that is E41-8412. Ask a question about this product: Ask Question Thank you for the question!Questions are usually answered within 1-2 business days.