Product Overview
In an automatic scooter, the center spring regulates how quickly the rear pulley opens and closes, directly dictating the belt tension and shift timing.
The Sun Racing 1000 RPM Center Spring provides slightly more tension than a standard factory spring. This extra stiffness delays the upshift just long enough to keep the engine in its optimal power band, eliminating the sluggish “lag” often felt when twisting the throttle from a complete stop or when climbing inclines.
Key Features & Benefits
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Enhanced Acceleration: Delivers immediate throttle response and stronger low-end torque, making it perfect for stop-and-go city riding.
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Premium Spring Steel Construction: Manufactured from high-tensile, heat-treated steel alloy to prevent sagging or losing tension under heavy thermal loads.
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Balanced 1000 RPM Tuning: Strikes the perfect middle ground—stiffer than stock to eliminate belt slippage, but forgiving enough to prevent engine over-revving and maintain fuel efficiency.
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Direct Drop-In Replacement: Engineered to meet precise OEM dimensional standards for a straightforward, hassle-free installation.
Technical Specifications
| Attribute | Specification |
| Brand | SUN Racing Genuine / SUN Racing Spirit |
| Component Type | CVT Center Spring (Compression Spring) |
| Tension Rating | 1000 RPM |
| Material | High-Grade Heat-Treated Spring Steel |
| Primary Color | Signature Powder-Coated Blue |
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