20 TECHNICAL DATA
112
20.3
Carburetor
Carburetor type
KEIHIN PWK 28
Needle position
3rd position from top
Idle air adjusting screw
open
2 turns
Main jet
142 (140, 145, 148)
Jet needle
NRKC (NRJC)
Idling jet
48 (45, 50)
Throttle slide
3
Choke nozzle
62
20.3.1
Carburetor tuning
KEIHIN PWK 28
ASL
TEMP
−
20 …
−
7 °C
(
−
4 … 19 °F)
−
6 … 5 °C
(21 … 41 °F)
6 … 15 °C (43
… 59 °F)
16 … 24 °C
(61 … 75 °F)
25 … 36 °C
(77 … 97 °F)
37 … 49 °C
(99 …
120 °F)
2,301 …
3,000 m
(7,549 …
9,843 ft)
ASO
IJ
NDL
POS
MJ
2
45
NRK C
3
142
2
42
NRK C
3
142
1.5
42
NRJ C
3
140
2
42
NRJ C
3
138
1.5
40
NRJ C
3
138
1,501 …
2,300 m
(4,925 …
7,546 ft)
ASO
IJ
NDL
POS
MJ
2
48
NRK C
3
145
2
45
NRK C
3
142
2
42
NRK C
3
142
1.5
42
NRJ C
3
140
2
42
NRJ C
3
138
1.5
40
NRJ C
3
138
751 …
1,500 m
(2,464 …
4,921 ft)
ASO
IJ
NDL
POS
MJ
2
48
NRJ C
4
145
2
48
NRK C
3
145
2
45
NRK C
3
142
2
42
NRK C
3
142
1.5
42
NRJ C
3
140
2
42
NRJ C
3
138
301 …
750 m (988
… 2,461 ft)
ASO
IJ
NDL
POS
MJ
2
48
NRJ C
4
148
1.5
48
NRK C
3
148
2
48
NRK C
3
145
2
45
NRK C
3
142
2
42
NRK C
3
142
1.5
42
NRJ C
3
140
0 … 300 m
(0 … 984 ft)
ASO
IJ
NDL
POS
MJ
2
48
NRJ C
4
148
1.5
48
NRK C
3
148
2
48
NRK C
3
145
2
48
NRK C
3
142
2
45
NRK C
3
142
1.5
42
NRK C
3
140
ASL
Sea level
TEMP
Temperature
ASO
Idle air adjusting screw open
IJ
Idling jet
NDL
Needle
POS
Needle position from top
MJ
Main jet
