Emission Control Carburetor Components (Dr350Ser) - Suzuki DR350 Service Manual

OR350R/SER ('94-MOOEL) 13-28
EMISSION CONTROL CARBURETOR COMPONENTS (DR350SER)
DR350SER motorcycles are equipped with precision. manufactured carburetors for emission level con-
trol. These ca rburetors require special mixture control components and other percision adjustments
t o function properly .
There are several carburetor mixture control components in each carburetor assembly. Three (3) of
these components afe mac hined to much c loser toleran ces than standard mac hined carburetor jets.
These three {31 particular jets - MAIN JET, NEEDLE JET. PILOT JET - must not be replaced by
stan-
dard jets. To aid in identifying these three (3) jets a different de sign of letter and number are used .
If replacement of these close tolerance jets becomes necessary, be sure to replace them with the same
type close tolerance jets marked as in the examples shown below .
The jet needle is also of special m anufacture. Only one clip position is provided on the jet needle.
If repl acem ent becom es necessary the jet needle may only be replaced with an equivalent performing
replacement component. Suzuki recommends that Genuine Suzuki Parts be utilized whenever possi-
ble for the best possible pe rformance and durability.
Conventional Figures Used
1 2 3
4
5
6 7
8 9 0
on St andard Tolerance Jet
Components
Emission Type Figures
I
Used On Close Toleranc e
2 3 Lf 5 5 '7
B
9
0
Jet Components
The carburetor specification for the emission-con trolled DR350SER are as foHows.
Carburetor Main Needle
J et
Pilot Pilot
1.0. No. Jet J et Needle J et
Screw
14ES
PRE-SET
(California model)
#12'1.5 0-6 5CD16 #:1'1.5
DO NOT
14EP
ADJUST
(Other state models)
The pilot screw is pre-set by the fac tory utilizing specialized testing and adjusting proced ures. The
pilot screw is not adjustable as the idle c ircuit is "sealed " after fac tory adjustment. Adjusting, inter-
ferring 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 persons, who are unaware of these special ca rburetor servicing requirements tamper w ith the car-
buretors the Suzuki dealer should rest ore the carburetors to their original condition or if unable to ef-
fect repai rs. contact the di stributors representative for further technical information and assistance.