Koso Clutch kit | Jog 50cc by Koso.Koso High-Performance clutch kit for Jog 50cc. Specifications Designed to fit the Jog 50cc Includes torque spring Includes drive pulley and roller

KOSO Spring Slider Base with Ball Bearings | for 50cc by KOSO.The Koso spring slider comes complete with base plate, spring holder and ball bearings. The design of the spring...

KOSO Clutch X-Power Rollers | for 50-90cc (7g) by KOSO.Hi-performance rollers designed for performance or racing. Specifications Fits 50cc and 90cc Weight: 7g Pack of 6 rollers Dimension: D15X12mm

KOSO Clutch X-Power Rollers | for 50-90cc (6g) by KOSO.Hi-performance rollers designed for performance or racing. Specifications Fits 50cc and 90cc Weight: 6g Pack of 6 rollers Dimension: D15X12mm

KOSO Clutch X-Power Rollers | for 50-90cc (4.5g) by KOSO.Hi-performance rollers designed for performance or racing. Specifications Fits 50cc and 90cc Weight: 4.5g Pack of 6 rollers Dimension: D15X12mm

KOSO REAR CLUTCH SHIFT SPRING | 1000 RPM by KOSO.Specifications 1000 RPM

KOSO Torque Spring | 2000 rpm by KOSO.High quality compression spring with a special hi-efficiency coating to resist heat build up and keep spring tension consistent from the start of...

KOSO Torque Spring | 2000 rpm by KOSO.High quality compression spring with a special hi-efficiency coating to resist heat build up and keep spring tension consistent from the start of...

KOSO Torque Spring | 1000 rpm by KOSO.High quality compression spring with a special hi-efficiency coating to resist heat build up and keep spring tension consistent from the start of...

Koso Light Weight Drive Face | 50cc by Koso.Clutch lightweight drive face light weight fits many models. Specifications Fits JOG / MAJESTY / GY6 / JOCKEY / JR / DIO...

Koso Drive pulley | Dio 50 (Ruckus, etc) by Koso.Koso High-Performance Variator is a lightweight optimized variator designed to fit right onto your CVT. Designed to fit the Honda Ruckus,...

Koso Drive pulley | Dio 50 (Ruckus, etc) by Koso.Koso High-Performance Variator is a lightweight optimized variator designed to fit right onto your CVT. Designed to fit the Honda Ruckus,...