This steel middle gear is supplied as a single 1pc aftermarket replacement for Kyosho motorcycle models and is intended to act as the central transmission stage, transferring torque from motor pinion to spur assembly with consistent engagement.
Engineered as a steel component to extend service life compared with standard plastic gears, the part is suitable where durability and stable gear mesh are required during typical running or mild tuning. It remains a standalone drivetrain gear rather than a complete gearbox unit.
Professional fitment notes: verify shaft concentricity and bearing clearance before installation, establish correct tooth contact with the pinion and spur, and avoid introducing excessive axial load to bearings. Confirm free rotation through suspension travel to prevent binding under load.