Cylinder Head KitsScooter Parts Catalog has the cylinder head kits for engines from 47cc, 50cc, 110cc, 125cc, 150cc, and 250cc scooter engine. Included in the cylinder kits are cylinder heads, cylinder head cover, scooter pistons, intake valves, exhaust valves, gaskets, piston rings, valve springs complete cylinders and more.
To rebuild or upgrade your 4 stroke gas scooter engine you will find all the necessary cylinder parts as a kit to match the parts you need. We stock a wide range of cylinder rebuild kits for Chinese-built 50cc GY6 QMB139, 125cc GY6 QMI152/157 and 150cc GY6 QMJ152/157 engines.
 
Polini 44mm Cylinder Kit for Yamaha Zuma and C3 50cc 4-Stroke (146-84)
Polini 44mm Cylinder Kit for Yamaha Zuma and C3 50cc 4-Stroke (146-84)
Regular Price: $449.00
Season Special: $384.99
47cc and 49cc 2-Stroke Performance Cylinder Kit (107-67)
47cc and 49cc 2-Stroke Performance Cylinder Kit (107-67)
Regular Price: $154.99
Season Special: $89.99
Koso 170cc 61mm Big Bore Kit - Honda Grom (128-6)
Koso 170cc 61mm Big Bore Kit - Honda Grom (128-6)
Regular Price: $599.00
Season Special: $374.99
 
47mm QMB139 Cylinder & Head Kit  (151-242)
47mm QMB139 Cylinder & Head Kit (151-242)
Regular Price: $107.00
Season Special: $79.99
47mm QMB139 Cylinder Kit  (151-255)
47mm QMB139 Cylinder Kit (151-255)
Regular Price: $83.00
Season Special: $59.99
Universal Parts QMB139 39mm Cylinder Kit  (151-257)
Universal Parts QMB139 39mm Cylinder Kit (151-257)
Regular Price: $69.00
Season Special: $38.99
 
Universal Parts QMB139 50mm Big Bore Cylinder Kit  (151-258)
Universal Parts QMB139 50mm Big Bore Cylinder Kit (151-258)
Regular Price: $93.00
Season Special: $69.99
Universal Parts Minarelli 40mm Cylinder & Head Kit  (161-226)
Universal Parts Minarelli 40mm Cylinder & Head Kit (161-226)
Regular Price: $93.00
Season Special: $70.99
Universal Parts Minarelli 47mm Big Bore Cylinder Kit  (161-227)
Universal Parts Minarelli 47mm Big Bore Cylinder Kit (161-227)
Regular Price: $120.00
Season Special: $89.99
 
Universal Parts Minarelli 50mm Cylinder Kit  (161-228)
Universal Parts Minarelli 50mm Cylinder Kit (161-228)
Regular Price: $129.00
Season Special: $99.99
Universal Parts GY6 150cc 57.4mm Cylinder Kit  (164-308)
Universal Parts GY6 150cc 57.4mm Cylinder Kit (164-308)
Regular Price: $69.00
Season Special: $49.99
Universal Parts GY6 61mm Big Bore Cylinder Kit  (164-309)
Universal Parts GY6 61mm Big Bore Cylinder Kit (164-309)
Regular Price: $93.00
Season Special: $70.99
 
Universal Parts GY6 63mm Big Bore Cylinder Kit  (164-310)
Universal Parts GY6 63mm Big Bore Cylinder Kit (164-310)
Regular Price: $107.00
Season Special: $79.99
Jog Big Bore Head Kit 47mm/12mm (169-153)
Jog Big Bore Head Kit 47mm/12mm (169-153)
Regular Price: $195.00
Season Special: $149.99
90cc Minarelli Big Bore Head Kit 54mm/12mm (169-154)
90cc Minarelli Big Bore Head Kit 54mm/12mm (169-154)
Regular Price: $195.00
Season Special: $169.99
 
Hoca GY6 4T Power Pack (169-162)
Hoca GY6 4T Power Pack (169-162)
Regular Price: $700.99
Season Special: $499.99
Jog 90cc Liquid-Cooled Cylinder Kit (169-165)
Jog 90cc Liquid-Cooled Cylinder Kit (169-165)
Regular Price: $305.00
Season Special: $257.99
4-Valve Cylinder Kit Honda (169-167)
4-Valve Cylinder Kit Honda (169-167)
Regular Price: $417.00
Season Special: $294.99
 
Cylinder Set for 180cc Power Kit (169-172)
Cylinder Set for 180cc Power Kit (169-172)
Regular Price: $176.00
GY6 61mm Cylinder Kit (169-173)
GY6 61mm Cylinder Kit (169-173)
Regular Price: $188.00
Season Special: $143.99
TB60 Big Bore Kit (169-185)
TB60 Big Bore Kit (169-185)
Regular Price: $70.99
Season Special: $49.99
 
Hoca Minarelli 2T Power Pack - 10mm Pin (169-210)
Hoca Minarelli 2T Power Pack - 10mm Pin (169-210)
Regular Price: $700.99
Season Special: $469.99
Hoca Minarelli 2T Power Pack - 12mm Pin (169-211)
Hoca Minarelli 2T Power Pack - 12mm Pin (169-211)
Regular Price: $699.99
Season Special: $499.00
Hoca Minarelli 2T Power Pack - 90cc (169-212)
Hoca Minarelli 2T Power Pack - 90cc (169-212)
Regular Price: $728.99
Season Special: $519.99
 
Samurai 58.5mm Big Bore Cylinder Kit (169-213)
Samurai 58.5mm Big Bore Cylinder Kit (169-213)
Regular Price: $260.99
Season Special: $185.99
Samurai 63mm Big Bore Cylinder Kit (169-214)
Samurai 63mm Big Bore Cylinder Kit (169-214)
Regular Price: $330.99
Season Special: $235.99
Hoca QMB139 4T Power Pack (169-233)
Hoca QMB139 4T Power Pack (169-233)
Regular Price: $770.99
Season Special: $549.99
 
Hoca GY6 Ceramic Big Bore Kit (169-277)
Hoca GY6 Ceramic Big Bore Kit (169-277)
Regular Price: $242.99
Season Special: $169.99
Hoca GY6 Ceramic Big Bore Kit (169-278)
Hoca GY6 Ceramic Big Bore Kit (169-278)
Regular Price: $290.99
Season Special: $206.99
Hoca GY6 58.5mm Big Bore Kit (169-314)
Hoca GY6 58.5mm Big Bore Kit (169-314)
Regular Price: $168.00
Season Special: $119.99
 
Hoca Minarelli Ceramic Big Bore Racing Kit - 10mm Pin (169-331)
Hoca Minarelli Ceramic Big Bore Racing Kit - 10mm Pin (169-331)
Regular Price: $269.00
Season Special: $199.99
Hoca 54mm Minarelli Big Bore Kit - Tall (169-340)
Hoca 54mm Minarelli Big Bore Kit - Tall (169-340)
Regular Price: $240.00
Season Special: $175.99
Hoca 52mm QMB139 Performance Cylinder Kit (169-342)
Hoca 52mm QMB139 Performance Cylinder Kit (169-342)
Regular Price: $175.00
Season Special: $124.99
 
Hoca Minarelli Ceramic Big Bore Racing Kit - 12mm Pin (169-385)
Hoca Minarelli Ceramic Big Bore Racing Kit - 12mm Pin (169-385)
Regular Price: $269.00
Season Special: $194.99
Hoca 39mm Dio SR Performance Cylinder Kit (169-389)
Hoca 39mm Dio SR Performance Cylinder Kit (169-389)
Regular Price: $175.00
Season Special: $124.99
Hoca 50mm Dio SR Performance Cylinder Kit (169-390)
Hoca 50mm Dio SR Performance Cylinder Kit (169-390)
Regular Price: $210.00
Season Special: $149.99
 
Hoca CN250 75mm Big Bore Cylinder Kit (169-394)
Hoca CN250 75mm Big Bore Cylinder Kit (169-394)
Regular Price: $299.00
Season Special: $219.99
Hoca 39mm Kymco 2-Stroke LC Cylinder Kit (169-402)
Hoca 39mm Kymco 2-Stroke LC Cylinder Kit (169-402)
Regular Price: $230.00
Season Special: $164.99
Hoca 47mm Kymco 2-Stroke LC Big Bore Cylinder Kit (169-403)
Hoca 47mm Kymco 2-Stroke LC Big Bore Cylinder Kit (169-403)
Regular Price: $259.00
Season Special: $189.99
 
SSP-G 39mm Kymco 2-Stroke AC Cylinder Kit (169-404)
SSP-G 39mm Kymco 2-Stroke AC Cylinder Kit (169-404)
Regular Price: $182.00
Season Special: $129.99
Hoca 47mm Kymco 2-Stroke AC Big Bore Cylinder Kit (169-405)
Hoca 47mm Kymco 2-Stroke AC Big Bore Cylinder Kit (169-405)
Regular Price: $199.00
Season Special: $149.99
Hoca 63mm Honda Grom Big Bore Cylinder Kit  (169-432)
Hoca 63mm Honda Grom Big Bore Cylinder Kit (169-432)
Regular Price: $310.00
Season Special: $247.99
 
Hoca 47mm Minarelli Vertical 70cc Big Bore Kit (169-451)
Hoca 47mm Minarelli Vertical 70cc Big Bore Kit (169-451)
Regular Price: $195.00
Season Special: $8.99
SSP-G Zuma 50F Big Bore Cylinder & Head Kit - 47mm
SSP-G Zuma 50F Big Bore Cylinder & Head Kit - 47mm
Regular Price: $590.00
Season Special: $479.99
GY6 63mm Big Bore Cylinder Kit (169-53)
GY6 63mm Big Bore Cylinder Kit (169-53)
Regular Price: $195.00
Season Special: $149.99
 
50cc 4-stroke QMB139 Cylinder set (169-54)
50cc 4-stroke QMB139 Cylinder set (169-54)
Regular Price: $195.00
Season Special: $116.99
70cc Minarelli big bore kit (169-57)
70cc Minarelli big bore kit (169-57)
Regular Price: $195.00
Season Special: $139.99
GY6 180cc Power Kit (169-99)
GY6 180cc Power Kit (169-99)
Regular Price: $499.00
Season Special: $474.99
 
Kymco Grand Dink Big bore kit 78.5mm (182-1)
Kymco Grand Dink Big bore kit 78.5mm (182-1)
Regular Price: $375.00
Season Special: $298.99
Morini 41mm Cylinder Kit (185-1)
Morini 41mm Cylinder Kit (185-1)
Regular Price: $112.00
Season Special: $79.99
Hoca Morini 47mm Big Bore Cylinder Kit (185-10)
Hoca Morini 47mm Big Bore Cylinder Kit (185-10)
Regular Price: $182.00
Season Special: $139.99
 
Morini 47mm Big Bore Cylinder Kit (185-6)
Morini 47mm Big Bore Cylinder Kit (185-6)
Regular Price: $140.00
Season Special: $99.99
Cylinder Head Cover Clip (180-73)
Cylinder Head Cover Clip (180-73)
Regular Price: $8.00
Season Special: $0.99
Naraku GY6 63mm Big Bore Kit
Naraku GY6 63mm Big Bore Kit
Regular Price: $238.00
Season Special: $164.99
 
Naraku 52.4mm Performance Cylinder & Head Kit
Naraku 52.4mm Performance Cylinder & Head Kit
Regular Price: $360.00
Season Special: $239.99
Athena 47.6mm Dio SR Performance Cylinder Kit
Athena 47.6mm Dio SR Performance Cylinder Kit
Regular Price: $277.00
Season Special: $197.99
Athena 47.6mm A/C Minarelli Performance Cylinder Kit
Athena 47.6mm A/C Minarelli Performance Cylinder Kit
Regular Price: $272.00
Season Special: $193.99
 
Athena 47.6mm Vertical Minarelli Cylinder Kit
Athena 47.6mm Vertical Minarelli Cylinder Kit
Regular Price: $272.00
Season Special: $193.99
Athena 47.6mm L/C Minarelli Performance Cylinder Kit
Athena 47.6mm L/C Minarelli Performance Cylinder Kit
Regular Price: $344.00
Season Special: $245.99
Polini 63mm Cylinder Kit For Vespa PX (146-61)
Polini 63mm Cylinder Kit For Vespa PX (146-61)
Regular Price: $322.00
Season Special: $289.99
 
Polini 47mm Cylinder Kit For Honda Lead 50cc 2-Stroke (146-49)
Polini 47mm Cylinder Kit For Honda Lead 50cc 2-Stroke (146-49)
Regular Price: $184.00
Season Special: $159.99
Airsal 50mm Big Bore Cylinder Kit For QMB139 50cc (158-3)
Airsal 50mm Big Bore Cylinder Kit For QMB139 50cc (158-3)
Regular Price: $121.00
Season Special: $119.99
Airsal 46mm Cylinder Kit For Kymco And SYM 2-Stroke (158-2)
Airsal 46mm Cylinder Kit For Kymco And SYM 2-Stroke (158-2)
Regular Price: $104.00
Season Special: $89.99
 
Naraku Performance Cylinder For 100cc AC Minarelli (137-49)
Naraku Performance Cylinder For 100cc AC Minarelli (137-49)
Regular Price: $124.00
Season Special: $109.99
Universal Parts VOG 260 Cylinder Kit (122-100)
Universal Parts VOG 260 Cylinder Kit (122-100)
Regular Price: $104.00
Season Special: $89.99
Polini 43.5mm Puch Maxi Cylinder Kit (146-48)
Polini 43.5mm Puch Maxi Cylinder Kit (146-48)
Regular Price: $265.00
Season Special: $259.99
 
Naraku 70cc Performance Cylinder For AC Minarelli (137-26)
Naraku 70cc Performance Cylinder For AC Minarelli (137-26)
Regular Price: $82.00
Season Special: $76.99
SSP-G 61mm Drop In Cylinder Kit For GY6 (169-485)
SSP-G 61mm Drop In Cylinder Kit For GY6 (169-485)
Regular Price: $180.00
Season Special: $156.99
Naraku 50cc Cylinder Kit For SYM (137-71)
Naraku 50cc Cylinder Kit For SYM (137-71)
Regular Price: $150.00
Season Special: $134.99
 
Universal Parts QMB139 Cylinder & Head Kit 69mm Valves (151-280)
Universal Parts QMB139 Cylinder & Head Kit 69mm Valves (151-280)
Regular Price: $92.00
Season Special: $79.99
Naraku 42mm Performance Cylinder Kit For SYM (137-15)
Naraku 42mm Performance Cylinder Kit For SYM (137-15)
Regular Price: $138.00
Season Special: $124.99
Polini 49mm Cylinder Kit For Vespa ET4 (146-74)
Polini 49mm Cylinder Kit For Vespa ET4 (146-74)
Regular Price: $280.00
Season Special: $284.99
 
Universal Parts Complete 50mm QMB139 80cc Kit (151-269)
Universal Parts Complete 50mm QMB139 80cc Kit (151-269)
Regular Price: $150.00
Season Special: $129.99
SSP-G 50mm QMB139 Big Bore Cylinder And Head Kit (169-518)
SSP-G 50mm QMB139 Big Bore Cylinder And Head Kit (169-518)
Regular Price: $230.00
Season Special: $199.99
SSP-G 52mm QMB139 Big Bore Cylinder And Head Kit (169-536)
SSP-G 52mm QMB139 Big Bore Cylinder And Head Kit (169-536)
Regular Price: $243.00
Season Special: $210.99
 
Universal Parts GY6 Cylinder Kit For Buggies And ATVs 150cc 57.4mm (164-336)
Universal Parts GY6 Cylinder Kit For Buggies And ATVs 150cc 57.4mm (164-336)
Regular Price: $81.00
Season Special: $69.99
Naraku GY6 58.5mm Big Bore Kit (137-61)
Naraku GY6 58.5mm Big Bore Kit (137-61)
Regular Price: $113.00
Season Special: $109.99
SSP-G 59mm Z125 Performance Cylinder Kit (169-467)
SSP-G 59mm Z125 Performance Cylinder Kit (169-467)
Regular Price: $230.00
Season Special: $199.99
 
Naraku 50cc Cylinder Kit For AC Minarelli (137-56)
Naraku 50cc Cylinder Kit For AC Minarelli (137-56)
Regular Price: $76.00
Season Special: $69.99
Polini 47mm Vertical Minarelli Corsa Cylinder Kit (146-42)
Polini 47mm Vertical Minarelli Corsa Cylinder Kit (146-42)
Regular Price: $334.00
Season Special: $289.99
Polini 47mm Horizontal Minarelli Corsa Cylinder Kit (146-50)
Polini 47mm Horizontal Minarelli Corsa Cylinder Kit (146-50)
Regular Price: $350.00
Season Special: $289.99
 
Naraku 47mm Performance Cylinder Kit (137-13)
Naraku 47mm Performance Cylinder Kit (137-13)
Regular Price: $121.00
Season Special: $104.99
Athena A/C Piaggio Cylinder Kit 47.6mm (135-9)
Athena A/C Piaggio Cylinder Kit 47.6mm (135-9)
Regular Price: $243.00
Season Special: $210.99
Airsal 70cc Cylinder And Head Kit For LC Piaggio (158-1)
Airsal 70cc Cylinder And Head Kit For LC Piaggio (158-1)
Regular Price: $243.00
Season Special: $174.99
 
Naraku 70cc Performance Cylinder For LC Piaggio (137-16)
Naraku 70cc Performance Cylinder For LC Piaggio (137-16)
Regular Price: $121.00
Season Special: $109.99
SSP-G Power Kit GY6 232cc 4V (169-531)
SSP-G Power Kit GY6 232cc 4V (169-531)
Regular Price: $2,100.00
Season Special: $1,649.99
SSP-G GY6 241cc 4V Power Kit (169-532)
SSP-G GY6 241cc 4V Power Kit (169-532)
Regular Price: $2,200.00
Season Special: $1,799.99
 
Universal Parts GY6 Cylinder And Head Kit (164-319)
Universal Parts GY6 Cylinder And Head Kit (164-319)
Regular Price: $104.00
Season Special: $89.99
Universal Parts Horizontal Honda Style Cylinder & Head Kit (290-257)
Universal Parts Horizontal Honda Style Cylinder & Head Kit (290-257)
Regular Price: $114.99
Season Special: $89.99
Universal Parts Horizontal Honda Style Head 110cc (290-259)
Universal Parts Horizontal Honda Style Head 110cc (290-259)
Regular Price: $69.00
Season Special: $59.99
 
Universal Parts Horizontal Honda Style Cylinder 125cc (290-258)
Universal Parts Horizontal Honda Style Cylinder 125cc (290-258)
Regular Price: $46.00
Season Special: $49.99
Polini 47mm Cylinder Head For Horizontal Minarelli 2-Stroke (146-79)
Polini 47mm Cylinder Head For Horizontal Minarelli 2-Stroke (146-79)
Regular Price: $67.00
Season Special: $58.99
Polini 44mm Cylinder Kit for Yamaha Zuma and C3 50cc 4-Stroke (146-84)
Polini 44mm Cylinder Kit for Yamaha Zuma and C3 50cc 4-Stroke (146-84)
Regular Price: $449.00
Season Special: $384.99
 
Polini 14/41 Gear Set for Yamaha Zuma (146-85)
Polini 14/41 Gear Set for Yamaha Zuma (146-85)
Regular Price: $115.00
Season Special: $99.99