MTX 251 Hornet Lightweight Steel Rear Sprocket #520 (49T) (11H-428-49) Yamaha End frames are cold-chamber die-cast

End frames are cold-chamber die-cast and machined on precision fixtures

All Balls one way Bearing kits are made from premuim products and give you a quick and cost effective solution

TOTAL LENGTH OF STAND approx 300mm LENGTH OF SPRING approx 90mm

Internal diameter (Spark plug): 9

MTX 251 Hornet Lightweight Steel Rear Sprocket #520 (49T) (11H-428-49) Yamaha End frames are cold-chamber die-castPrecision machined Rear sprocket from C45 Hardened steel for durability and a perfect fit. Protected with a Anti Corrosive electroplated Zinc finish. CNC machined from case hardened Chromoly steel the MTX Hornet Lightweight Steel rear sprockets are built to last. The combination of the fully heat treated steel and computer designed weight reduction holes the MTX Hornet will last longer than any alloy sprocket and weigh less than solid OEM steel