2022 YAMAHA ZUMA125 BWS125 Light-Weigth Final Gear. GS

G STONE GS Series final drive light-weight gear. 
 
1. Light-weight gearing decreases the engine's burden which can potentially increase acceleration and engine longevity 
2. German SKIVING precision machined gears 
3. Nickel-chromium-molybdenum alloy steel, SAE8620
SAE8620 steel is hardened and tempered which gives good core strength and toughness.