Renthal 1230-520-50GPBK REN Rear Sprockets riding-apparel-under-garments Triples the flow area by

Triples the flow area by putting valving control on the shim stack instead of the overly restricted stock piston

but it adds 2in

2025 Ski-Doo MX Z X E-TEC 600R 129

2023 Kawasaki KLX140R

Renthal 1230-520-50GPBK REN Rear Sprockets riding-apparel-under-garments Triples the flow area byRenthal Twinring motocross rear sprocket was developed as the ultimate dirt bike rear sprocket for those looking to ride more and work less. The unique, dual material design combines a hardened steel outer chain ring that is heated to 200degreeC before being permanently fitted to our Ultralight aluminum inner, creating a permanent bond for the life of the sprocket.