Bolt for Primary Drive Gear $ 11.00 SKU: 90105-10445 Primary drive gear bolt. Back to: Top End and Crankshaft ×Close Yamaha Yamaha is a leader in businesses ranging from musical instruments and audio & video products to information technology products, new media services, home furnishings, auto components, specialty metals, music education and resort facilities. http://www.global.yamaha.com/ Description Will suit all models from 1991 onwards.