Carburetor; Carburetor Tuning - GAS GAS MC 85 2023 Owner's Manual

20.3

Carburetor

Carburetor type
Needle position
Idle air adjusting screw
open
Main jet
Jet needle
Idling jet
Throttle slide
Choke nozzle
20.3.1

Carburetor tuning

KEIHIN PWK 28
−20 ... −7 °C
ASL TEMP
(−4 ... 19 °F)
ASO 2
2,301 ...
IJ 45
3,000 m
NDL NRK C
(7,549 ...
POS 3
9,843 ft)
MJ 142
ASO 2
1,501 ...
IJ 48
2,300 m
NDL NRK C
(4,925 ...
POS 3
7,546 ft)
MJ 145
ASO 2
751 ...
IJ 48
1,500 m
NDL NRJ C
(2,464 ...
POS 4
4,921 ft)
MJ 145
ASO 2
301 ... IJ 48
750 m (988 NDL NRJ C
... 2,461 ft) POS 4
MJ 148
ASO 2
IJ 48
0 ... 300 m
NDL NRJ C
(0 ... 984 ft)
POS 4
MJ 148
ASL
TEMP
ASO
IJ
NDL
POS
MJ
KEIHIN PWK 28
3rd position from top
2 turns
142 (140, 145, 148)
NRKC (NRJC)
48 (45, 50)
3
62
−6 ... 5 °C
6 ... 15 °C (43
(21 ... 41 °F) ... 59 °F)
2 1.5
42 42
NRK C NRJ C
3 3
142 140
2 2
45 42
NRK C NRK C
3 3
142 142
2 2
48 45
NRK C NRK C
3 3
145 142
1.5 2
48 48
NRK C NRK C
3 3
148 145
1.5 2
48 48
NRK C NRK C
3 3
148 145
Sea level
Temperature
Idle air adjusting screw open
Idling jet
Needle
Needle position from top
Main jet
TECHNICAL DATA 20
16 ... 24 °C 25 ... 36 °C
(61 ... 75 °F) (77 ... 97 °F)
2 1.5
42 40
NRJ C NRJ C
3 3
138 138
1.5 2
42 42
NRJ C NRJ C
3 3
140 138
2 1.5
42 42
NRK C NRJ C
3 3
142 140
2 2
45 42
NRK C NRK C
3 3
142 142
2 2
48 45
NRK C NRK C
3 3
142 142
37 ... 49 °C
(99 ...
120 °F)
1.5
40
NRJ C
3
138
2
42
NRJ C
3
138
1.5
42
NRJ C
3
140
1.5
42
NRK C
3
140
111