SUNSTAR SPROCKETS Rear Sprocket 40 Tooth Yamaha 2-354040

Sunstar is the largest OEM and aftermarket supplier of motorcycle and ARV sprockets in the manufacturing world for every major Japanese motorcycle builder since 1946, Computer-designed weight reduction holes for the best combination of lightness, strength and stability, Exclusive tooth-valley design provides 50% better chain contact area for the best power transfer possible, Cleaning grooves added at bottom of tooth area