For some models Athena also supplies special long stroke racing kits complete with crankshafts and reinforced connecting rods. The Athena Big Bore kit is the missing source for increasing your motorcycles raw power. The included cylinder is constructed out of aluminum with a nickel-carbide coating to increase durability.
The water jets have been widened for a higher. Athena Big Bore Kit - 144cc P400250100011. The water jets have been widened for a higher flow rate, keeping the cylinder cool.
Athena built a reliable cast piston that has been molybdenum-coated for high performance use and extended wear life.