Polini Clutch spring Set; Honda Dio, 139QMB

This Polini Clutch Spring Set works with Vespa 50cc scooters, Honda Dio and 139QMB 50cc engines. Includes 12 clutch springs in 4 different RPM settings: 4k - 7k. Original Parts For Scooters SKU 146-7 Specifications: Includes 12 clutch springs in 4 different RPM settings: 4k - 7k Fits clutch nuts with an M28 thread and a 39mm socket size Compatibility: Genuine Buddy 50 Genuine Buddy 50 International Genuine Brio 50i Genuine RoughHouse 50 Genuine RoughHouse 50 Sport 139QMB-based 50cc / 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle. About Polini: Polini has been on the scene since 1945, and is rumored to have built a big bore kit for the first Vespa before Piaggio even knew they were going to build the prototype. They have built on their long history of adding power and performance to vintage Vespa scooters by continually coming out with performance parts for modern Vespas, Honda Ruckus and Yamaha Zuma scooters. *Performance upgrades are considered racing parts and are not covered by warranty.