- 3 ports + exhaust port bore 13.7 mm

-maxium bottom & top-end power dlc coated crankshaft

- 2x tungsten balanced crankshaft rear ball-bearing- japan front ball-bearing - japan

- specially selected & matched sleeve/ piston set

-individually lapped slevve7 piston for easier and faster break-in

- 7 ribs engine head 

- carburetor with 2 needles

-venturi 5.5 mm