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Brand: 101-Octane
Part #: 155-3
Description: 101-Octane Engine Bolt Set for 139QMB 49/50cc 4-stroke engine. See product image of included pieces. Includes CVT cover bolts, cylinder studs, oil drain plug, and much more! A handy set to have when rebuilding your engine. The kits come with either all silver color hardwa..
$39.95
Brand: G
Part #: 151-242-39
Description: Cast-Iron Cylinder 39mm 50cc with Cast Aluminum Piston. The cylinder bore is 39mm. Cylinder 39mm 50cc 2V Cast Big Bore Kit includes the following parts 39mm (50cc) cylinder jug with cast piston and 2V 64mm height cylinder head. Cylinder 39mm 50cc 2V Cast Big Bore Kit is suitable fo..
$79.95
Brand: G
Part #: 151-242-47
Description: Cast-Iron Cylinder 47mm 72cc with Cast Aluminum Piston. The cylinder bore is 47mm. Cylinder 47mm 72cc 2V Cast Big Bore Kit includes the following parts 47mm (72cc) cylinder jug with cast piston and 2V 64mm height cylinder head. Cylinder 47mm 72cc 2V Cast Big Bore Kit is suitable fo..
$79.95
Brand: G
Part #: 1100-1515
Description: Cast-Iron Cylinder 47mm 72cc with Cast Aluminum Piston. The cylinder bore is 47mm. The cylinder 47mm 72cc 2V Cast Big Bore Kit includes the following parts 47mm (72cc) cylinder jug with cast piston and 2V 69mm height cylinder head. Cylinder 47mm 72cc 2V Cast Big Bore Kit is suitabl..
$79.95
Brand: G
Part #: 151-242-50
Description: Cast-Iron Cylinder 50mm 72cc with Cast Aluminum Piston. The cylinder bore is 50mm. Cylinder 50mm 81cc 2V Cast Big Bore Kit includes the following parts 50mm (81cc) cylinder jug with cast piston and 2V 64mm height cylinder head. Cylinder 50mm 81cc 2V Cast Big Bore Kit is suitable fo..
$79.95
Brand: G
Part #: 151-263
Description: Cylinder Head 47mm 72cc 2V 18.4/16 Fit 69mm for 139QMB 49/50cc 4-stroke engines. Common problems with stock cylinder heads on the Chinese 4-stroke engines are generally known to be expensive repair maintenance costs. Chinese replacement cylinder heads for GY6 engines are only of me..
$49.95
Brand: G
Part #: 1100-1334
Description: Cylinder Side Bolt M6x85mm Set for 139QMB 49/50cc scooter engine. May also be used in other applications.
Specifications:Include the following Hexagon cylinder bolts.• 2x Stainless Steel Flange Bolts: M6x85mm / Hex Head: 8x6mm• Thread: M6x1x25mm / Overall L: m..
$4.00
Brand: G
Part #: 151-133-4
Description: Standard Cylinder Stud 168mm 176mm 2-Valve Set for 139QMB 49cc-88cc. Includes two short studs at M7x168mm and two longer studs at M7x176mm. Set of 4 studs.NOTE:
Long thread screw into the crankcase, the shorter thread is nutted. Recommended apply blue Loctite and torque no more than 6..
$17.99
Brand: G
Part #: 1100-4004
Description: Cylinder Stud M7x168mm 2-Valve for 139QMB 49/50cc 4-stroke engines.NOTE:
Long thread screw into the crankcase, the shorter thread is nutted. Recommended apply blue Loctite and torque no more than 6 ft-lbs max. on these 7mm studs. For assurance please consult your manufa..
$1.99
Brand: G
Part #: 1100-4004
Description: Cylinder Stud 176mm 2-Valve for 139QMB 49/50cc 4-stroke engines.NOTE:
Long thread screw into the crankcase, the shorter thread is nutted. Recommended apply blue Loctite and torque no more than 6 ft-lbs max. on these 7mm studs. For assurance please consult your manufacturer's..
$1.99
Brand: G
Part #: 175-59
Description: Cylinder Stud Nut M7 with Washer Set for 139QMB scooter. Can be used for mounting the camshaft seat in 139QMB 50cc 4-stroke scooters. May also be used in other applications.NOTE: Nut the shorter thread of cylinder studs. Recommended apply blue Loctite and torque no more than 6 ft-l..
$2.99
Brand: G
Part #: 175-43
Description: Cylinder Stud Nut M8x7.6mm Serrated Set for GY6 4-stroke 125/150cc+ engine. May also be used in other applications.Specifications: Include the following Cylinder stud nut set.• 4x Serrated Flange Nuts ID: M8 / OD: 12<16mm / H: 7.6mm• Fit Intak..
$1.95
Brand: G
Part #: 164-324
Description: EGR block-off Plate used for removing EGR system on 139QMB 49/50cc 4-stroke, GY6 125/150cc 4-stroke, and various unlisted makes/model scooter engines. This plate can be used to block off the hole in your cylinder head if your emissions system is leaking or for performance applicati..
$12.95
Brand: G
Part #: 0900-4011
Description: Fan shroud cylinder head rubber seal/liner for the 139QMB 49/50cc 4-stroke, GY6 125/150cc 4-stroke, and various unlisted makes/model scooter engines.Specifications: Include the following cylinder head rubber seal/liner.• 1x Hi-Temp Cylinder Head Seal/Liner•&n..
$4.95
Brand: G
Part #: 151-244
Description: Valve Cover Non-EGR for 139QMB 49/50cc 4-stroke engines.Specifications:Include the following Valve cover only.• 1x Alloy Aluminum Valve Cover Stud Hole Crisscross: 135mm / 140mm• Fit Fan: 110mm / Shroud: QMB / Shroud..
$22.95
Brand: G
Part #: 151-80
Description: Performance Valve Exhaust 2V 16mm intake valve. This Valve Exhaust 2V 16 fits cylinder head 39mm 2V for 139QMB 49/50cc engines (scooters, quads, and buggies).NOTE: This valve is ONLY for 64mm valves length cylinder head 39mm 2V. Use in conjunction with a 64mm&nb..
$7.99
Brand: G
Part #: 151-246
Description: Performance Valve Exhaust 2V 16mm intake valve. This Valve Set 2V 16 fits cylinder head 39mm 2V for 139QMB 49/50cc engines (scooters, quads, and buggies).NOTE: This valve set is ONLY for 69mm valves length cylinder head 39mm 2V. Use in conjunction with a 69mm&nb..
$7.99
Brand: G
Part #: 151-79
Description: Performance Valve Intake 2V 18.4mm intake valve. This Valve Intake 2V 18.4 fits cylinder head 39mm 2V for 139QMB 49/50cc engines (scooters, quads, and buggies).NOTE: This valve set is ONLY for 64mm valves length cylinder head 39mm 2V. Use in conjunction with a 6..
$7.99
Brand: G
Part #: 151-245
Description: Performance Valve Intake 2V 18.4mm Fit 69mm. This Valve Set 2V 18.4 fits cylinder head 39mm 2V for 139QMB 49/50cc engines (scooters, quads, and buggies).NOTE: This valve is ONLY for 69mm valves length cylinder head 39mm 2V. Use in conjunction with a 69mm ro..
$7.99
Brand: G
Part #: 151-79-80
Description: Performance Valve Set 2V 18.4mm intake / 16mm exhaust valve. This Valve Set 2V 18.4/16 fits cylinder head 39mm 2V for 139QMB 49/50cc engines (scooters, quads, and buggies). NOTE: This valve set is ONLY for 64mm valves length cylinder head 39mm 2V. Use in conjunction with ..
$15.95
Brand: G
Part #: 151-245-6
Description: Performance Valve Set 2V 18.4mm intake / 16mm exhaust valve. This Valve Set 2V 18.4/16 fits cylinder head 39mm 2V for 139QMB 49/50cc engines (scooters, quads, and buggies).NOTE: This valve set is ONLY for 69mm valves length cylinder head 39mm 2V. Use in conjunction with a..
$15.95
Brand: G
Part #: 151-239
Description: Valve Set 2V 18.4/16 Kit for upgrade 139QMB 49/50cc engines (scooters, quads, and buggies). NOTE: This valve set is ONLY for 64mm valves length cylinder head 39mm 2V. Use in conjunction with a 64mm rocker arm 2V ONLY (will not fit 69mm). For 69mm valve leng..
$24.00
Brand: G
Part #: 151-262
Description: Valve Set 2V 18.4/16 Kit Fit 69mm for upgrade 139QMB 49/50cc engines (scooters, quads, and buggies). NOTE: This valve set is ONLY for 69mm valves length cylinder head 39mm 2V. Use in conjunction with a 69mm rocker arm 2V ONLY (will not fit 64mm). For 64mm valve lengt..
$25.95
Brand: Hoca
Part #: 169-381
Description: Performance Hoca Valve Set 2V larger 21.5mm intake / 19mm exhaust valve. This Hoca Valve Set 2V 21.5/19 fits cylinder head 39mm 2V for 139QMB 81-88cc engines (scooters, quads, and buggies). NOTE: Use in conjunction with a 64mm cylinder head 2V and 64mm rockerarm 2V O..
$22.50
Brand: Malossi
Part #: 3113243
Description: Malossi Cylinder 52mm 88cc Big Bore Kit w/Cast Piston in aluminum with hard chromed liner for 139QMB 49/50cc 4-stroke Chinese Scooter. The bore = 87.9cc capacity. The original head may be retained according to the manufacturer, but only super unleaded should be used due to the..
$269.95