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Cylinders and Big Bore Kits

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OEM Replacement Cylinder for original Piaggio Typhoon / Zip AC Scooters

$119.99

Top quality original Piaggio cylinder for all air-cooled Piaggio engines. Piston, piston pin and circlip are included. We recommend to use a fresh set of gaskets when mounting a new cylinder. Cylinder head is not included, so please use the …

Koso 61mm Forged Piston Kit – Honda Grom

$99.99

Koso 61mm Forged Piston Kit (MD623000) for the Honda Grom 170cc Big Bore Kit. Includes piston, pin, cir clips and rings Piston Diameter: 61mm Piston Type: Forged Compression Ratio: 11.5 to 1 Piston Compression Height: 19.5mm

KOSO 4V Cylinder Head kit for Honda GROM®

$689.95

4V Cylinder Head kit for Honda GROM® Our Koso 4V Cylinder Head kit for Honda GROM® is the ideal engine part to complete the Koso Honda GROM® Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This …

Charmo 58mm Ceramic Cylinder 144cc BBK for Aprilia RS-125

$399.99

High Quality and affordable complete ceramic coated 144cc big bore rebuild kit for RS125. Comes with everything pictured including cylinder, piston, rings, wrist pin, circlips, and gasket set! Installation video below:

KOSO 170cc Big Bore Cylinder kit for Honda GROM®

$344.99

170cc Big Bore Cylinder kit for Honda GROM® Want to unleash all the power your Honda GROM® can handle? Our 170cc Big Bore Cylinder kit for Honda GROM® is the perfect addition for you ! The kit includes a ceramic coated cylinder, 61 mm forged piston, …