Factory Spec, FS-1655, 15 Tooth Front Sprocket Yamaha Raptor 700, YFZ450R & YFZ450X Manufactured by Factory Spec Front Sprocket for Yamaha ATV 15 tooth, front steel Sprocket 520 pitch Made in China This sprocket may not be the stock size for all models it fits. When changing sprocket sizing, a different length chain may be needed meets or exceeds OEM specifications Heat treated for long life and durability