SSP-G performance CVT torque spring for GY6 125cc and 150cc 4-stroke scooters. Rated at 1500 RPM engagement, this yellow progressive-wind spring delays clutch engagement to a higher RPM compared to stock � resulting in a more aggressive launch feel, improved mid-range pull, and higher sustained RPM through the power band. Direct drop-in replacement for the rear pulley torque spring on GY6 157QMJ / 152QMI-based engines. Made in Taiwan by SSP-G.
Key Features:
Specifications:
Compatibility: Fits GY6 157QMJ and 152QMI 125cc�150cc scooters using a standard CVT rear pulley torque spring. Universal fit for any QMJ / QMI / QMK engine platform with matching spring seat dimensions.
Tuning note: Higher RPM springs (like 1500 RPM) raise engagement speed for a more aggressive launch but may reduce low-speed crawl ability. Pair with appropriate roller weights to optimize your CVT shift curve for the desired riding style.
Off-road use only. Not intended for use on public roads or land.
