These chain & sprocket kits are designed to offer you the same performance offered as OE chain and sprocket kits. Comprising of JT Steel front and rear Sprockets and an OE spec D.I.D drive chain that is tailored to your specific motorcycle, these kits will provide an unrivaled level of performance for 1000's of miles.C49 High Carbon Steel rear sprocket, Chromoly Steel Alloy front sprocket and OE spec DID drive chain provide OE performance at a fraction of the cost.Kits are built up to the same gearing as the bike had the day it left the factory.Kits include Pro-Street X-Ring, Super Non-O-Ring or Standard Heavy Duty drive chain all dependent on what motorcycle you have, providing peace of mind that these kits are built to last.D.I.D Chain & Sprocket kits are put together using 2 of the most recognized names within the chain and sprocket industry, leaving you safe in the knowledge that you are buying quality for your pride and joy.