50cc carburetor tuning for Keihin CVK on a QMB139 Chinese scooter engine

11 months ago
19
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Main jet kit: http://www.partsforscooters.com/114-49-QMB139-Main-Jet-Kit?sc=34&category=133078
Air filter: https://amzn.to/2ref3uw
Carburetor: https://amzn.to/2JL7li2

0:00 intro
0:57 Main jet
3:37 Elevation
7:26 Pilot jet
10:00 Idle
11:47 Needle
13:11 Accelerator pump
13:36 Temperature
14:21 Summary

This is a complete tutorial showing you how to tune a 50cc Chinese scooter carburetor. I will show you how to select the right jets, check the spark plug, and how to tell if the engine is running too lean or too rich.

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