NCY Compression Spring (GY6), 1500 rpm

DESCRIPTION: The NCY 1500 rpm clutch pulley Compression Spring is specifically designed to prevent belt slip and ensure optimum acceleration for GY6 engines.Specifications:Wire Diameter: 4.2mmInner Diameter: 48.5mmLength: 154.0mmCompatibility:GY6 engines139QMB-based 50cc / 80cc engines with the following engine codes:139QMA139QMB1P39QMB1P39QMA-2YN139QMBJJ1P39QMB139FMA-2BD1P39QMBBN139QMB147QMDOther QMA modelsOther QMB models157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.Mechanic’s Notes:Compression springs (also known as contra springs) do two things. First, they provide lateral pressure on the drive belt to prevent belt slip. Second, they determine the rate at which the CVT transmission changes from lower to higher gear ratios.For optimum acceleration, match the clutch pulley transition from lower to higher gear to the peak power of your scooter.For example: If your scooter creates peak power at 7500 rpm and your current compression spring is transitioning to fully open at 6000 engine rpm, your acceleration will be slower than optimal. Increasing the stiffness of your compression spring will increase the engine RPM required to achieve the highest gear ratio in this example.Stiffer Compression Spring = More Belt Tension & Pressure + Higher RPM transitionSofter Compression Spring = Less Belt Tension & Pressure + Lower RPM transitionLooking for more performance upgrades? This spring is also available as part of ourStage 1 GY6 150 Performance Kit!About NCY:NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan*Performance upgrades are considered racing parts and are not covered by warranty.
SPECIFICATIONS: Wire Diameter: 4.2mmInner Diameter: 48.5mm
COMPATIBILITY: GY6 engines139QMB-based 50cc / 80cc engines with the following engine codes:139QMA139QMB1P39QMB1P39QMA-2YN139QMBJJ1P39QMB139FMA-2BD1P39QMBBN139QMB147QMDOther QMA modelsOther QMB models157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.Mechanic’s Notes:Compression springs (also known as contra springs) do two things. First, they provide lateral pressure on the drive belt to prevent belt slip. Second, they determine the rate at which the CVT transmission changes from lower to higher gear ratios.For optimum acceleration, match the clutch pulley transition from lower to higher gear to the peak power of your scooter.For example: If your scooter creates peak power at 7500 rpm and your current compression spring is transitioning to fully open at 6000 engine rpm, your acceleration will be slower than optimal. Increasing the stiffness of your compression spring will increase the engine RPM required to achieve the highest gear ratio in this example.Stiffer Compression Spring = More Belt Tension & Pressure + Higher RPM transitionSofter Compression Spring = Less Belt Tension & Pressure + Lower RPM transitionLooking for more performance upgrades? This spring is also available as part of ourStage 1 GY6 150 Performance Kit!About NCY:NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan*Performance upgrades are considered racing parts and are not covered by warranty.
139QMB ENGINES: based 50cc / 80cc engines with the following engine codes:139QMA139QMB1P39QMB1P39QMA-2YN139QMBJJ1P39QMB139FMA-2BD1P39QMBBN139QMB147QMDOther QMA modelsOther QMB models157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.Mechanic’s Notes:Compression springs (also known as contra springs) do two things. First, they provide lateral pressure on the drive belt to prevent belt slip. Second, they determine the rate at which the CVT transmission changes from lower to higher gear ratios.For optimum acceleration, match the clutch pulley transition from lower to higher gear to the peak power of your scooter.For example: If your scooter creates peak power at 7500 rpm and your current compression spring is transitioning to fully open at 6000 engine rpm, your acceleration will be slower than optimal. Increasing the stiffness of your compression spring will increase the engine RPM required to achieve the highest gear ratio in this example.Stiffer Compression Spring = More Belt Tension & Pressure + Higher RPM transitionSofter Compression Spring = Less Belt Tension & Pressure + Lower RPM transitionLooking for more performance upgrades? This spring is also available as part of ourStage 1 GY6 150 Performance Kit!About NCY:NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan*Performance upgrades are considered racing parts and are not covered by warranty.
157QMJ ENGINES: based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.Mechanic’s Notes:Compression springs (also known as contra springs) do two things. First, they provide lateral pressure on the drive belt to prevent belt slip. Second, they determine the rate at which the CVT transmission changes from lower to higher gear ratios.For optimum acceleration, match the clutch pulley transition from lower to higher gear to the peak power of your scooter.For example: If your scooter creates peak power at 7500 rpm and your current compression spring is transitioning to fully open at 6000 engine rpm, your acceleration will be slower than optimal. Increasing the stiffness of your compression spring will increase the engine RPM required to achieve the highest gear ratio in this example.Stiffer Compression Spring = More Belt Tension & Pressure + Higher RPM transitionSofter Compression Spring = Less Belt Tension & Pressure + Lower RPM transitionLooking for more performance upgrades? This spring is also available as part of ourStage 1 GY6 150 Performance Kit!About NCY:NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan*Performance upgrades are considered racing parts and are not covered by warranty.
NOTE: s:Compression springs (also known as contra springs) do two things. First, they provide lateral pressure on the drive belt to prevent belt slip. Second, they determine the rate at which the CVT transmission changes from lower to higher gear ratios.For optimum acceleration, match the clutch pulley transition from lower to higher gear to the peak power of your scooter.For example: If your scooter creates peak power at 7500 rpm and your current compression spring is transitioning to fully open at 6000 engine rpm, your acceleration will be slower than optimal. Increasing the stiffness of your compression spring will increase the engine RPM required to achieve the highest gear ratio in this example.Stiffer Compression Spring = More Belt Tension & Pressure + Higher RPM transitionSofter Compression Spring = Less Belt Tension & Pressure + Lower RPM transitionLooking for more performance upgrades? This spring is also available as part of ourStage 1 GY6 150 Performance Kit!About NCY:NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan*Performance upgrades are considered racing parts and are not covered by warranty.