SCM415 chromoly steel alloy is used for the front sprocket, and ultra-durable high carbon C49 steel for the rear sprocket. OEM quality 525 chain kit for SpeedMaster 800/865 includes DID or RK chain & choice of sprockets in stock or custom sizes. JT Twinstar Rear Sprocket 50T (520) - JTX251.50GR | Canada Specialists Catalog JT Sprockets 525 Steel Rear Sprocket Jt Sprocket Chain Follow these instructions to create your account with and learn how to log in and modify your account information SCM415 chromoly steel alloy is used for the front sprocket, and ultra-durable high carbon C49 steel for the rear sprocket X-Ring seals are used for a better seal and produce less friction than conventional O-ring chains Kit contains: 16 tooth chromoly front sprocket; 45 tooth steel rear sprocket; and JT 525X1R-114 link chain Fits: Yamaha YZF-R6 06-12., Kit contains: 16 tooth chromoly front sprocket; 45 tooth steel rear sprocket; and JT 525X1R-114 link chain. Channel Finder - Where Can You Watch
