Carburetor; Carburetor Tuning - KTM 300 EXC Owner's Manual

22 TECHNICAL DATA
22.3
Carburetor type
Carburetor identification number
Needle position
Jet needle
Main jet
Idling jet
Choke nozzle
Needle jet
Idle air adjusting screw
Open
Throttle slide
22.3.1
MIKUNI TMX 38
ASL
2,301 ...
3,000 m
(7,549 ...
9,843 ft)
1,501 ...
2,300 m
(4,925 ...
7,546 ft)
751 ...
1,500 m
(2,464 ...
4,921 ft)
301 ...
750 m
(988 ...
2,461 ft)
0 ...
300 m (0
... 984 ft)
ASL
TEMP
ASO
IJ
NDL
POS
138

Carburetor

Carburetor tuning

−20 ... −7 °C
TEMP
(−4 ... 19 °F)
ASO 2.5
IJ 32.5
NDL 43-73
POS 3
MJ 470
ASO 2
IJ 35
NDL 43-73
POS 3
MJ 470
ASO 2
IJ 35
NDL 43-73
POS 3
MJ 480
ASO 2
IJ 37.5
NDL 43-73
POS 3
MJ 490
ASO 2
IJ 40
NDL 43-73
POS 3
MJ 500
MIKUNI TMX 38
TMX 38 86
3rd position from top
6BFY43-73 (6BFY42-73, 6BFY42-74, 6BFY43-74)
470 (460, 480, 490)
35 (32.5/37.5/40)
80
S-4
2 turns
4
−6 ... 5 °C
6 ... 15 °C
(21 ... (43 ...
41 °F) 59 °F)
2.5 2
30 32.5
43-73 42-73
3 3
460 460
2.5 2.5
32.5 30
43-73 43-73
3 3
470 460
2 2.5
35 32.5
43-73 43-73
3 3
470 470
2 2
35 35
43-73 43‑73
3 3
480 470
2 2
35 35
43-73 43-73
3 3
480 470
Sea level
Temperature
Idle air adjusting screw open
Idling jet
Needle
Needle position from top
16 ... 24 °C 25 ... 36 °C
(61 ... (77 ...
75 °F) 97 °F)
2 2
30 30
42-73 43-73
3 2
450 450
2 2
32.5 30
42-73 42-73
3 3
460 450
2.5 2
30 32.5
43-73 42-73
3 3
460 460
2.5 2.5
32.5 30
43-73 43-73
3 3
470 460
2.5 2.5
32.5 30
43-73 43-73
3 3
470 460
37 ... 49 °C
(99 ...
120 °F)
2
30
43-73
2
450
2
30
42-73
3
450
2
32.5
42-73
3
460
2
32.5
42-73
3
460