The all-new SC3 model SmartCarb kit is compatible with stock or modified (big bore) Kawasaki KLX140 4-stroke dirt bikes, offering crisp, clean throttle response, substantial performance gains, and unparalleled ease of use.

Choose the 26mm SC3 if replacing the stock carburetor in a stock bore KLX140. Choose the 28mm SC3 if replacing the stock carburetor in 170cc-220cc big bore setup. 

The 28mm SC3 Uses a 50mm (2 inch) OD filter side.  

Components required to adapt the Keihin PWK28 or similarly sized aftermarket carburetors (intake, throttle cable, and airbox rubber boot) are compatible with the 28mm SC3.

Will need a throttle cable that works with aftermarket carbs such as TBW1539 throttle cable.