Zhejiang Qianjiang Motorcycle RKV 200, Service Manual, Page: 129 / 171

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XI. Carburetor
Service Data--------------------------11. 1
Fault Diagnosis----------------------11. 2
Disassembly of carburetor---------11. 3
Installation of carburetor-----------11. 4
11. 1 Service Data
Function of carburetor: It is a key part of engine fuel supply system, and its operation status has
a direct bearing on operation stability, power and economic indexes of the engine. It atomizes a
certain amount of gasoline into fine oil droplets and mixes these droplets with different amounts of
air evenly, thus forming combustible mixed gas mist with different density depending on the needs
of engine under different operating conditions and promptly supplying the gas to engine, ensuring
continuous and normal operation of engine.
Precautions
The gasoline is combustible and explosive, therefore operation must be conducted in a
well-ventilated place.
After the carburetor is disassembled, take necessary measures to prevent ingress of any foreign
matter.
If a carburetor has not been used for one month, oil in the float chamber shall be released to prevent
idling jet from being clogged as a consequence of gasoline degradation.
Table of Standard Items of Reference Items
Item Standard value
Main metering jet 262
Idling metering jet 70
Oil needle C03-0
11. 2 Fault Diagnosis
Poor startup Difficult to startup, flaming out after
startup or unstable during idling
No fuel in carburetor Clogged carburetor
Gasoline filter clogged
Too thick or thin mixed gas
Gasoline tube clogged Secondary air entering into intake system