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Big Bore Kits & Cylinder Kits

67 Products

Universal Parts OE Style replacement cylinder kits and performance big bore kits from top brands like SSP-G, Koso, Naraku, Athena and Polini for 2-stroke and 4-stroke scooters and motorcycles.

Naraku 50cc Cylinder Kit for AC Piaggio 2-Stroke

Part #: 137-88

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$94.99

Naraku 50cc Cylinder Kit for SYM

Part #: 137-71

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$134.99

TFC 54mm Cylinder and Stroker Crankshaft Kit - Honda Dio

Part #: 179-1

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$509.99

Universal Parts QMB139 39mm Cylinder Kit

Part #: 151-257

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$38.99

Universal Parts QMB139 Cylinder & Head Kit - 64mm Valves

Part #: 151-242

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$79.99

Universal Parts QMB139 Cylinder & Head Kit - 69mm Valves

Part #: 151-280

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$79.99

Naraku 42mm Performance Cylinder Kit for SYM

Part #: 137-15

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$124.99

Out of Stock

Universal Parts 47mm QMB139 Cylinder Kit

Part #: 151-255

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$59.99

Out of Stock

SSP-G Zuma 50F Big Bore Cylinder & Head Kit - 47mm

Part #: 169-452

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$499.99

Polini 49mm Cylinder Kit for Vespa ET4

Part #: 146-74

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$329.99

Universal Parts QMB139 50mm Big Bore Cylinder Kit

Part #: 151-258

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$69.99

Out of Stock

Universal Parts Complete 50mm QMB139 80cc Kit

Part #: 151-269

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$129.99

SSP-G 50mm QMB139 Performance Cylinder Kit

Part #: 169-54

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$116.99

SSP-G 50mm QMB139 Big Bore Cylinder and Head Kit

Part #: 169-518

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$199.99

Out of Stock

SSP-G 52mm QMB139 Big Bore Cylinder and Head Kit

Part #: 169-536

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$224.99

Out of Stock

Airsal 50mm Big Bore Cylinder Kit for QMB139 50cc

Part #: 158-3

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$119.99

Naraku QMB139 52.4mm Performance Cylinder & Head Kit

Part #: 137-4

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$254.99

Out of Stock

Koso 150cc Big Bore Kit - Honda Grom & Monkey (2022+)

Part #: 128-53

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$429.99

Universal Parts Horizontal Honda Style Cylinder & Head Kit

Part #: 290-257

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$69.99 to $119.99

Universal Parts Horizontal Honda Style Cylinder - 125cc

Part #: 290-258

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$39.99

Universal Parts GY6 150cc 57.4mm Cylinder Kit

Part #: 164-308

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$49.99

Universal Parts GY6 150cc 57.4mm Cylinder Kit for Buggies and ATVs

Part #: 164-336

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$69.99

Universal Parts GY6 Cylinder and Head Kit

Part #: 164-319

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$81.99 to $91.99

Naraku GY6 58.5mm Big Bore Kit

Part #: 137-61

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$109.99

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