Polini Performance Torque Spring Set: Honda Ruckus & Metro

GET Going Faster: Polini Performance Torque Spring Set Eliminate belt slip and optimize your shifting curve with the Polini Performance Torque Spring Set . Specifically engineered for the GET Motor Honda Ruckus and Metropolitan , this kit replaces the weak factory contra spring to provide consistent pressure on the rear pulley. Whether you are running a stock setup or a highly modified 50cc engine, these springs help keep your CVT in the powerband longer, improving uphill climbing and snappier throttle response. Precision Tuning Options Every rider’s setup is unique, which is why Polini includes two distinct spring rates in this master set: 7% Increase (White): Ideal for stock engines or riders looking for a slight boost in mid-range acceleration without over-revving. 15% Increase (Blue): The go-to choice for scooters with performance variators, exhaust upgrades, or big-bore kits that require higher RPM engagement. Technical Performance Features High-Tensile Silicon Steel: Manufactured from premium alloy to resist "spring fatigue," ensuring consistent tension even after hours of high-heat operation. Reduced Belt Slip: Increased seat pressure prevents the drive belt from slipping under heavy load, maximizing power delivery to the rear wheel. Optimized Shift Recovery: Helps the transmission "downshift" faster when slowing for corners or approaching an incline. Italian Engineering: Precision-wound by Polini in Italy to match the exact tolerances of the Honda 50cc 4-stroke drivetrain. Comprehensive Fitment Guide This spring set (243.020) is a direct-fit performance upgrade for the following models: Brand / Engine Compatible Models Honda (GET) Ruckus (NPS50), Metropolitan (CHF50 / NCH50) Technical Specifications Spring Rates Included: +7% and +15% over OEM Material: Silicon-Steel Alloy MPN: 243.020 Vendor: Polini Motori Mechanic's Note: If your Ruckus "bogs" when you hit a hill, your stock spring isn't pushing back hard enough. Tuning Tip: Start with the 7% spring for a daily commuter. If you find the belt is still slipping or you want more aggressive "gear" holding, step up to the 15% blue spring. Pro Tip: These work best when paired with a Polini Hi-Speed Variator for a total transmission transformation! SKU: 1200-1211, 243.020 Vendor: Polini