TB Parts - TBW9067 - 141CC BIG BORE KIT - 14MM PIN

141cc High Compression Bore Kit - 120cc / 138cc Engines Meets or Exceeds OEM Specifications. Key Features:  Lightweight all aluminum cylinder with steel liner (78mm tall) Cast in mounts on cylinder for aftermarket skid plates Oversized cooling fins on cylinder for efficient heat dissipation High compression 57mm piston with rings, pin, & clips (14mm wrist pin) Head and Base gasket kit Application: SDG Pro mini Other Pitbikes and engines with 52.4 x 55mm engines with 14mm wrist pin  This will make a huge difference in performance over your stock setup and is a very quick and easy upgrade. NEW Bigger dome piston, for use with Lifan 27mm/23mm Heads and TB 30mm/23.5mm heads only Kit Includes: TBW0601 - Cylinder TBW0424 - Gasket set TBW0824 - Piston