9
14
a. To set the high speed needle (large needle sticking out from the carburetor body), turn the screw as
pictured. Initial high speed needle setting should be 2.5 turns (close the needle completely, then back
out 2.5 turns). Clockwise turn will provide leaner setting (lower fuel to air mixture), and counterclockwise
turn will provide richer setting (higher fuel to air mixture).
b. To set the carburetor idle (small needle sticking out from the carburetor body), turn the screw as
pictured. Initial idle setting should leave 1mm carburetor gap. Clockwise turn will provide higher idle
(larger carburetor opening), and counterclockwise turn will provide lower idle (smaller carburetor
opening). For more details about the engine setting, please refer to ENGINE BREAK-IN/SETTING
procedures to properly set the engine.
c. To set the low speed needle (The low-speed mixture screw is located in the end of the carburetor).
turn the screw as pictured. Initial low speed needle setting should be 6 1/2 turns (close the needle
completely, then back out 6.5 turns). This screw controls how much fuel enters the engine at idle and
low throttle. This adjustment will smooth the idle and improve the acceleration to mid speed. Make
this adjustment with the throttle closed, after setting the idle. Turn the screw clockwise gently until it
stops. DO NOT over tighten.
d. Remove the outer foam from filter and make it moist evenly with a few drops of fuel. Put the filter in a
plastic bag and knead it until the foam is saturated, but not soaked.
e. Finally, make sure the air cleaner boot is securely fastened with a zip-tie.
Never run your vehicle without the air filter .If the vehicle will be operated in an area with fine dust, use
filter oil or caster oil instead of fuel. It is important that the foam is only moist to trap dirt and allow air
passage. With the foam too wet, limited air can pass through; therefore, limiting engine performance.
ADJUSTING CARBURETOR
abc
de
Low Speed Screw
Low Speed Screw
Idle Screw
Idle Screw
0.020" (0.5mm)
0.020" (0.5mm)
Richer
Richer
Leaner
Leaner
Richer
(More Fuel)
Leaner
(Less Fuel)
Richer
(More Fuel)
Leaner
(Less Fuel)
To Next Page
Loading...
Need help?
General
