125cc 4 Stroke Engine Motor Semi Auto Motorcycle Dirt Pit Bikes for FourTrax 125

  

125cc 4 Stroke Engine Motor Semi Auto Motorcycle Dirt Pit Bikes for FourTrax 125. Please contact to be clear on this. Engine Type: Single Cylinder, 4-Stroke, 2-Valve, Air Cooled. Compression ratio: 9.0:1. Front sprocket 420 - 17mm - 14T.

Transmission:Auto Transmission with Reverse. Package: you will get what you see in the picture. It is good idea if you like to either replace your old engine or upgrade your ATV or Go kart to be faster or more powerful.