Supersprox - MX Stealth Rear Drive Sprocket (RST-990-39-BLK) Options:39T - Black Brand Model Year YAMAHA Big

Brand Model Year YAMAHA Big Bear 350 2X4 YFM350U 1996-1999 YAMAHA Big Bear 350 4x4 YFM350FW 1996-1999 YAMAHA Big Bear 350 YFM350F 1997-1998 YAMAHA Big Bear 400 2x4 YFM400 2000-2004 YAMAHA Big Bear 400 Prof

2005 Husqvarna SM510R 510

2007 YAMAHA Big Bear 250 YFM250B

at 45 degrees of pull

Supersprox - MX Stealth Rear Drive Sprocket (RST-990-39-BLK) Options:39T - Black Brand Model Year YAMAHA BigSupersprox stealth is about longer life, without compromising weight. Primary goal, to last 3 times longer than an aluminum sprocket and remain as light as possible. It's about performance and function first and last. Its perfect for any bike up to 1400 cc. Do you have a powerful 4 stroke or performance street bike? Covering high mileage or road racing, then this is your best option. A single sprocket can last more than 20,000 miles (See maintenance