FITS: HONDA XR200R (84-02) HONDA XR250R (84-89) HONDA XL350R (84-85) HONDA XR350R (83-85) HONDA XR500R (83-84) HONDA XR600R (85-87) YAMAHA YZ125 (99-16) YAMAHA TTR230 (05-16) YAMAHA WR250F (01-16) YAMAHA WR250R (08-15) YAMAHA WR250X (08-11) YAMAHA YZ250 (99-16) YAMAHA YZ250F (01-16) YAMAHA YZ250FX (15-16) YAMAHA YZ50X (2016) YAMAHA WR426F (01-02) YAMAHA YZ426F (00-02) YAMAHA WR450F (03-16) YAMAHA YZ450F (03-16) YAMAHA YZ450FX (2016) Product Details: Primary Drive Front Sprockets are made to meet or exceed O.E.M. specifications. Using high-grade hardened steel, Primary Drive brand front ATV and motorcycle sprockets offer durability and value. Primary Drive Front Sprockets are precision machined for a perfect fit. Durable replacement front sprocket for motorcycles and ATV's. Manufactured to O.E.M. specs using high-grade hardened steel. Precision machined for a perfect fit. What's in the box 1x 42 Tooth Sprocket