Koso Soft Grip Handlebar Grip for scooters.

Temperature sensor from Koso for Stage6 or Koso rev counter / heat sensor. For air-cooled engines.

 Koso Speedo Meter with RPM, two thermoeter, fuel gauge and Odometer.

Koso fuel level gauge. 

 KOSO High Flow Oil Pump for GY6 Kymco 125-150cc

Dial-in your racing shocks with Koso Shock Pump.

 KOSO Oil Temp Sensor Adapter for Honda Ruckus Yamaha Zuma125 and GY6 150cc.

 KOSO PWK main jet kit

KOSO Cable Holder is great for holding Yamaha Zuma125 brake and speedo lines 

KOSO Cable Holder is great for holding Yamaha Zuma125 brake and speedo lines 

Yamaha Zuma 125 clutch bell by KOSO.

 Koso Zuma 125 CNC Handlebar Stem

 Koso Yamaha  Zuma125 Racing Clutch.

 KOSO High Flow Oil Pump for BWS / Zuma 125

Yamaha Zuma 125 Throttle Body and Intake Manifold from KOSO.

 Yamaha Zuma 125 Contra Torque Spring.

 Koso Yamaha Zuma125 LED Tail Light with turn signals