OEM QG125-3 Main Counter Shaft Gear Assembly Motorcycle Transmission Gears Axle Spindle Set Fit For QG125-3 motorcycle gearbox system; transmission case internal mounting layout;suitable for daily street motorcycle commuting engine overhaul repair Direct full gearbox internal replacement;aligns bearing seats shift gear meshing size;no transmission case or custom machining required Complete matched main shaft counter shaft gear combination;ensures smooth gear shifting between all speed levels;reduces gear jump grinding noise during acceleration machined hard gear teeth with polished spindle surface;adopts wear material;slows tooth abrasion under long time load riding Manufactured to OEM matching dimensional standards;fits closely with transmission bearings shift forks;maintains stable power transmission for long mileage