KTM 125 SX 2010, Руководство пользователя

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8-3
Carburetor adjustment
Basic information on the original carburetor setting
The original carburetor setting was adapted for an altitude of approx. 500 meters (1600 ft.) above sea level, and the ambient
temperature of approx. 20° C (68° F), mainly for off-road use and central European premium-grade fuel (ROZ 95/98). Mixing
ratio 2-stroke motor oil : super fuel 1:40 - 1:60.
Basic information on a change of the carburetor setting
Always start out from the original carburetor setting. Essential requirements are a clean air filter system, air-tight exhaust system
and an intact carburetor. Experience has shown that adjusting the main jet, the idling jet and the jet needle is sufficient and that
changes of other parts of the carburetor will not greatly affect engine performance.
RULE OF THUMB:
high altitude or high temperatures
→
choose leaner carburetor adjustment
low altitude or low temperatures
→
choose richer carburetor adjustment
  WARNING  
– Only use premium-grade gasoline ROZ 95/98 mixed with high-grade two-stroke engine oil. Other types of
gasoline can cause engine failure, and void your warranty.
– Only use high-grade 2-stroke engine oil of known brands.
– Not enough oil or low-grade oil can cause erosion of the piston. Using too much oil, the engine can start
smoking and foul the spark plug.
– In the case of a leaner adjustment of the carburetor proceed cautiously. Always reduce the jet size in steps of
one number to avoid overheating and piston seizure. Too much oil will cause smoke to form, the sparkplug to
become sooty and the octane number will begin to decrease.
NOTE: If despite a changed adjustment the engine does not run properly, look for mechanical faults and check the ignition
system.
Basic information on carburetor wear
Engine vibrations subject the throttle slide, jet needle, float needle valve and the needle jet to extreme wear. This wear may
cause carburetor malfunction (e.g., overly rich mixture). These parts should be replaced after 100 operating hours. The car-
buretor body, main jet holder and the float support should be replaced after 200 operating hours.
Explanation of table - Example
Compared to the needle NOZI, the jet needle NOZG is two steps leaner
in the range from the closed position of the throttle to 1/4 throttle.
Otherwise, there are no differences.
!
CAUTION
!
P
AY ATTENTION TO THE CORRECT NEEDLE DESIGNATION WHEN REPLACING
THE JET NEEDLE
. D
ETAILED INFORMATION ON THE TYPE OF JET NEEDLE
FOR THE RESPECTIVE MODELS CAN BE FOUND IN THE CARBURETOR
SETTING TABLE
.
NOZE
NOZF
NOZG
NOZH
NOZI
JET NEEDLE RANGE OF ACTION
TYPE RICHER LEANER
N1EE
N1EF
N1EG
N1EH
N1EI
JET NEEDLE RANGE OF ACTION
TYPE RICHER LEANER
N8RF
N8RG
N8RH
N8RW
N8RJ
JET NEEDLE RANGE OF ACTION
TYPE RICHER LEANER
N3EG
N3EH
N3EW
JET NEEDLE RANGE OF ACTION
TYPE RICHER LEANER
N2ZH
N2ZW
N2ZJ
JET NEEDLE RANGE OF ACTION
TYPE RICHER LEANER