SUN CENTER SPRING NMAX/AEROX 1500 RPM

Sun Racing 1500 RPM Center Spring for Yamaha NMAX & Aerox

Upgrade your scooter’s CVT system with the Sun Racing 1500 RPM Center Spring, engineered specifically for the Yamaha NMAX and Aerox 155. Designed for riders who demand sharper acceleration and a more responsive throttle, this high-performance torque spring alters your CVT’s shifting dynamics to keep your engine in its optimal power band.

Key Features & Specifications

• RPM Rating: 1500 RPM (Significantly stiffer than the stock factory spring).

• Compatibility: Precision-fit for Yamaha NMAX (v1 and v2) and Yamaha Aerox 155.

• Material: Constructed from high-tensile, heat-resistant steel alloy to prevent spring fade and maintain consistent tension during long, hot rides.

• Brand: Sun Racing (A trusted name in aftermarket CVT tuning).

Performance Benefits

• Aggressive Acceleration: The stiffer 1500 RPM tension delays the opening of the driven pulley, keeping the scooter in a lower “gear ratio” longer. This translates to instant, snappy power when you twist the throttle.

• Superior Hill Climbing: Prevents the CVT from upshifting too early, ensuring the engine stays in its peak torque range—making steep inclines significantly easier to tackle.

• Reduced Belt Slippage: Provides a much stronger grip on the CVT belt, preventing power loss and slippage under heavy loads or aggressive acceleration.

• Faster Overtaking: Delivers the rapid downshift effect needed for quick, confident overtakes in busy city traffic.

Who is this ideal for?

• City Commuters: Riders who need quick bursts of speed for stop-and-go traffic.

• Heavy Loads: Heavier riders, touring enthusiasts, or those who frequently ride with a passenger.

• Tuned Scooters: Perfect for riders upgrading their CVT system. Note: Upgrading to a 1500 RPM center spring is often best paired with slightly heavier or tuned roller weights to balance out the top speed, as an overly stiff spring on a stock setup can slightly reduce your top end.