JT Sprockets Sprocket - Rear - for Yamaha - 42-Tooth JTR1912.42

Computer-designed to achieve ultimate strength at minimum weight. JT combines leading-edge technology with top materials to produce the ultimate quality sprocket range with unbeatable value. Every sprocket meets or exceeds the highest possible quality standards set for the motorcycle industry. Sprockets are heat-treated and bead-blasted to reduce material surface tension. Front sprockets made with C45 steel and SCM415 chromoly steel alloy; rear sprockets made with top-quality-grade C45 high-carbon steel. NOTES:When installing sprockets which differ from Orig. Equipment sizes, check for proper clearances before operating.

• JT?Sprockets are made from the latest generation of computer design and control metal cutting equipment for maximum durability. JT rear sprockets are made from ultra-durable C49 high-carbon steel and 7075 aluminum. Front sprockets are made from chromoly SCM420 steel alloy. All sprockets are heat-treated and hand-finished to meet or exceed the highest possible quality standards.