Adjusting The Carburettor - SHERCO 125 ST Manual Del Propietário

MAINTENANCE PROCESSES

Adjusting the carburettor

CARBURETTOR
Carburettor type
Needle position
Jet needle
Main jet
Idle jet
Air regulation control opening
SEA LEVEL
Air screw adjustment
Idle jet
Over
Needle
2,000 m
Needle position
Main jet
Air screw adjustment
Idle jet
2,000 m
Needle
to
Needle position
1,000 m
Main jet
Air screw adjustment
Idle jet
1,000 m
Needle
to
Needle position
0 m
Main jet
98
A
B
ADJUSTMENT
The carburettor is adjusted in-factory, but it may
require small adjustments depending on the altitude
and weather conditions.
You may adjust the idle and richness of the air/fuel
mixture.
- IDLE: minimum engine carburation.
A
- RICHNESS: mixture of air and fuel.
B
The spark plug's condition is useful to check the
carburettor's richness.
Dried-out spark plug: poor carburation.
Clean spark plug: correct carburation.
Dirty spark plug: excessive carburation.
125 250
KEIHIN 28
KEIHIN 28
P5 P2+0.5
JJH
KEA 122 KEA 125
KEP 50 KEP 45
Between 0.5 and 1 rotation
125 250
O.5 → 1 O.5 → 1
55
JJK
4
118
O.5 → 1 O.5 → 1
55
JJJ
4
120
O.5 → 1 O.5 → 1
50
JJH
5
122
300
P4+0.5
JJH JJH
KEA 125
KEP 45
300
O.5 → 1
48 48
JJK JJK
4 4
120 120
O.5 → 1
48 48
JJJ JJJ
4 4
122 122
O.5 → 1
45 45
JJH JJH
4 4
125 125