JT Steel Rear Sprocket 42T for Street YAMAHA YZF-R1 2004-2008

Steel Rear Sprocket

O.E.M. Gearing: 17/45

Chain/Links: 530-116

Teeth:42

Using the latest generation of computer design and control metal cutting equipment for maximum durability.

Made from the finest C49 high carbon steel or 7075 T6 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.

Brand: JT
Part Number: JTR479.42