Athena Big Bore Cylinder Kit 4.0 mm Oversize to 58 mm - 144cc - P400250100011

Features:

• Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets
• Includes Forged piston, rings, clips and pin
• Athena top-end gasket set includes required seals and hardware
• Easy-to-follow step-by-step installation instructions
• Most are bolt-on; no machining required except where noted
• REAR WHEEL HORSE POWER: 41,2 HP / 11.000 RPM