Carburetion; Fuel-Air Mixture Ratio Changing - Suzuki RG250 Service Manual

FUEL AND LUBRICATION SYSTEM 5-6
CARBURETION
Adequate carburetion is determined according to the results of various tests, mainly concerning engine
power, fuel consumption and cooling effect of fuel on engine, and jet settings are made so as to satisfy and
balance all of these conditions. Therefore, the jet should not be replaced with a size other than the original,
and the positions of adjustable parts should not be changed except when compensating for the mixture
ratio due to
a~titude
differences or other climatic conditions. When adjustment is necessary, refer to the
following.
Fuel-air mixture ratio can be changed as fol lows:
Throttle Openi ng
Slight
Medium
High
Method of Changing Ratio
Pilot air screw
Leaner
Jet needle
Main jet
Richer
t
1 st leaner
t!!l
l
5th richer
Larger number:
richer mixture
Smaller number:
leaner mixture
Standard Setting
• 1-3/ 4 turns out
( R
&
L)
• 5DP5-3rd
(E-Ol , 06, 3D)
• 5DP5-2nd
(The others)
• :: 160