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20.3
Carburetor
Carburetor type
Carburetor identification number
Needle position
Jet needle
Main jet
Idling jet
Choke nozzle
Needle jet
Idle air adjusting screw
Open
20.3.1
Carburetor tuning
MIKUNI TMX 38
−20 ... −7 °C
ASL
TEMP
(−4 ... 19 °F)
ASO
1.5
2,301 ...
IJ
35
3,000 m
NDL
42-71
(7,549 ...
POS
3
9,843 ft)
MJ
450
ASO
1.5
1,501 ...
IJ
32.5
2,300 m
NDL
43-71
(4,925 ...
POS
3
7,546 ft)
MJ
450
ASO
1.5
751 ...
IJ
35
1,500 m
NDL
43-71
(2,464 ...
POS
3
4,921 ft)
MJ
460
ASO
1.5
301 ...
IJ
37.5
750 m
NDL
43-71
(988 ...
POS
3
2,461 ft)
MJ
470
ASO
1.5
0 ...
IJ
37.5
300 m (0
NDL
43-71
POS
3
... 984 ft)
MJ
470
ASL
TEMP
ASO
IJ
NDL
POS
MIKUNI TMX 38
TMX 38 89
3rd position from top
6BFY42-71 (6BFY43‑71)
450 (430, 440, 460, 470)
35 (30 / 32.5 / 37.5 / 40)
80
S‑1
1.5 turns
−6 ... 5 °C
6 ... 15 °C
(21 ...
(43 ...
41 °F)
59 °F)
1.5
2
32.5
32.5
42-71
42-71
3
3
440
430
1.5
1.5
35
32.5
42-71
42-71
3
3
450
440
1.5
1.5
32.5
35
43-71
42-71
3
3
450
450
1.5
1.5
35
32.5
43-71
43-71
3
3
460
450
1.5
1.5
35
32.5
43-71
43-71
3
3
460
450
Sea level
Temperature
Idle air adjusting screw open
Idling jet
Needle
Needle position from top
TECHNICAL DATA 20
16 ... 24 °C
25 ... 36 °C
(61 ...
(77 ...
75 °F)
97 °F)
1.5
1.5
32.5
30
43-71
43-71
2
2
430
420
2
1.5
32.5
32.5
42-71
43-71
3
2
430
430
1.5
2
32.5
32.5
42-71
42-71
3
3
440
430
1,5
1.5
35
32.5
42‑71
42-71
3
3
450
440
1.5
1.5
35
32.5
42-71
42-71
3
3
450
440
37 ... 49 °C
(99 ...
120 °F)
1.5
30
43-71
2
420
1.5
32.5
43-71
2
430
2
30
42-71
3
430
2
32.5
42-71
3
430
123
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