Gear 4th Driven 24T 5KE (D) $ 160.00 SKU: GEAR 4D 5KE-17241-10U Back to: Transmission & Driveline ×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 4Th driven gear (24T) This gear is Yamaha part number: 5KE-17241-10 Letter identification: 4D For use with 23T 4th drive gear (for 4D ratio).