QMB139 Big Bore Carburetor - GY650
Are you wanting to increase the performance and how snappy that throttle is? Look no further! This QMB139 (GY6 50cc) carburetor kit comes with a round slide carburetor, Uni pod air filter, large ported intake manifold, cable and jets! Not to mention this is all put together! This is a drop in kit!! We send the carburetor out with a base tune for a sea level altitude. You most likely will need to fine tune the carburetor. This is by far one of the best upgrade you can add to your 80cc - 100cc GY6 big bore kit.
Installed Jet:
pilot: 38
main: 135
If you want to take the guess work out of any tuning you may need to do, check out our Wide Band O2 Sensor.
EXTRA PILOT JETS INCLUDED:
32
35
38
40
42
45
48
50
52
55
EXTRA MAIN JETS INCLUDED:
100
105
108
110
115
120
125
130
135
140
