BEST GY6 100CC BBK BIG BORE KIT FOR 139QMB 1P39QMB SCOOTER ROKETA TAOTAO A9 CAM

Description

Brand new GY6
100CC
BBK
BIG BORE KIT
for Chinese 4 stroke
Scooters & Mopeds
Upgrade 49cc 50cc to
100cc
The best way to get more RPM, the maximum direct upgrade kit for GY6 50cc 139qmb engine without modification.
Why is this advertised as the best? Simple put, we don't throw in useless parts to make the BBK look enormous. Every component is carefully selected to boost performance, not just for the show. Without A9 cam and 69mm valves and rockers, your engine will not reveal the full potential of the BBK. You might find those so called 100cc BBK for a little cheaper, but they are all lack of the very key components to maximize your engine performance. We are the only supplier with the key combo included. Most of our customers are returning customers and experienced builders who know the true value of this kit.
Big Bore kit
includes
Fully assembled cylinder head
69mm high lift valves, best performance valves
69mm high lift rockers, best performance rockers
Cylinder body
Cylinder head gasket set
Carburetor main jets upgrade kit, new carb is useless if the jets are stock size
(added on 7/23/19)
A9 high performance camshaft
Piston & Rings set
69mm
high lift camshaft holder
Manifold added on 9/27/19
Bore kit
works with:
Roketa 49cc 50cc 4 stroke scooters such as Bahama, Maui, Sicily, Tank, Baotian 50QT-9
Taotao
49cc 50cc 4 stroke scooters such as GT5, Fastwind,  atm50-a1, cy50-a, cy50-b, cy50-t3, funny 50, Roman 50, Retro 50, Speedy 50, Venus 50
SUNL
49cc 50cc 4 stroke scooters
VIP future champion 4 stroke
Jonway 49cc 50cc 4 stroke scooters such as warrior 50
Baja
49cc 50cc 4 stroke scooters such as motorsports SC-50 sun city, primo
Zhongshen ZS50QT-4
Baotian BT49QT-2, BT49QT-7, BT49QT-9, BT50QT-9, BT50QT-11
Fly Scooter
49cc 50cc 4 stroke scooters
Tank
49cc 50cc 4 stroke scooters
Jinlun
49cc 50cc 4 stroke scooters
Multiple items can be combined shipping, please look at our other items, thank you.
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