Honda CBR 600 F4 (FX & FY). Covers 1999 & 2000 Models. D Gold X-Ring Chain & JT Sprockets Kit. Front Silent Running Rubber Cushioned with a Rear Top Quality JT Carbon Steel Sprockets. (525 Pitch Chain, 16 Tooth Front 44 Tooth Rear). D Japanese Professional Gold X-Ring VXGB Series OE Chain (with a rivit type connecting link). D is a Japanese original equipment chain. In developing the Pro-Street VX Series, D. D focused on improving chain “Rigidity”. Traditionally, “Tensile Strength” has been used to measure the strength of a chain. But Tensile Strength is only a laboratory measurement of a chain’s “breaking point”. Rigidity increases a chain’s ability to withstand forces that occur in a rider’s real world experience. Rigidity increases power transfer from the engine to the ground and greater resistance to stretching under load. Sprockets have a tough rubber damper which significantly reduces transmission noise. JT sprockets are made using only the best available materials. The JT Sprockets factory is the largest and most advanced in the world. It is fully equipped with high accuracy machinery, including the latest generation of CNC computer design and computer controlled metal cutting equipment. The essence of a high quality sprocket is in the high precision of manufacturing and the inherent quality of the material. Through accurate machining, JT ensures maximum durability and performance. JT Sprockets are manufactured the right way – by hobbing, machining and drilling. This is the only proven way to achieve the closest of tolerances and the most accurate teeth profiles. Heat treated and hand finished to perfection, all JT sprockets meet or exceed the highest possible quality standards set for the motorcycle industry.