Emission Control Devices: 1B-1
Emission Control Devices
Precautions
Precautions for Emission Control Devices
B649G11200001
Refer to “General Precautions: in Section 00”.
General Description
Carburetor System Description
B649G11201005
GSF1200/S motorcycles are equipped with precision carburetors that control emission levels.
The carburetor specifications for the emission-controlled GSF1200/S are described in the service data.
These carburetors require special mixture control components and precision adjustments to function properly.
There are several carburetor mixture control components in each carburetor assembly. Three jets (main, needle and
pilot) are machined to much closer tolerances than standard machined jets. If replacement of the jets is needed, be
sure to replace them only with the same type of jets.
A jet needle with only one clip position, is also used. If jet needle replacement is necessary, only replace it with a jet
needle of the same type. Suzuki recommends that Genuine Suzuki Parts be utilized whenever possible for the best
possible performance and durability.
Adjusting, interfering with, improper replacement, or resetting of any of the carburetor components may adversely
affect carburetor performance and cause the motorcycle to exceed the exhaust emission level limits. If unable to effect
repairs, contact the distributor’s representative for further technical information and assistance.
1
2
4
3
5
“A”
“B”
I649G1120007-03
1. Fuel tank 3. Vacuum hose 5. Carburetor “B”: Vacuum (Negative pressure)
2. Fuel valve 4. Fuel hose “A”: Fuel
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