Supersprox Rear Sprockets 125cc And Up - Gas Gas (Old) Stock Item:RS-GASG/BETA/HQV BK 51T This new thread pattern uses

This new thread pattern uses a pulse-shaped groove and deflectorthat optimizes water flow

19mm - Yamaha

Extra heavy duty regulation circuit

as air rises it's more efficient to push new oil up forcing air bubbles upward

Supersprox Rear Sprockets 125cc And Up - Gas Gas (Old) Stock Item:RS-GASG/BETA/HQV BK 51T This new thread pattern usesSupersprox rear sprockets available in 3 options, Stealth RST (alloy centre steel outer), Aluminium RAL and Steel RFE. Refer to Resources below for fitment chart. Refer to the below table for ordering information: Part number base Description SX RST Stealth SX RAL Aluminium SX RFE Steel