KTM 150 SX 2021 - 125 XC Us; Carburetor Tuning (125 XC US)

TECHNICAL DATA 21
133
21.3.7 125 XC US
Carburetor type MIKUNI TMX 38
Carburetor identification number TMX 38 77
Needle position 2nd position from top
Jet needle 6BFY43‑75 (6BFY42‑71 / 6BFY43‑71)
Main jet 470 (480, 490, 500, 520, 540)
Idling jet 32.5 (30 / 35 / 37.5 / 40)
Choke nozzle 80
Needle jet S‑7
Idle air adjusting screw
open 2 turns
21.3.8 Carburetor tuning (125 XC US)
For normal cross country circuits
MIKUNI TMX 38
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
32.5
43-75
2
470
2
30
43-75
2
460
2
32.5
42-75
2
470
2
32.5
42-75
2
460
2
30
42-75
2
450
1,501 …
2,300 m
(4,925 …
7,546 ft)
ASO
IJ
NDL
POS
MJ
2
35
43-75
2
480
2
32.5
43-75
2
470
2
30
43-75
2
460
2
32.5
42-75
2
470
1.5
30
42-75
2
460
2
30
42-75
2
450
751 …
1,500 m
(2,464 …
4,921 ft)
ASO
IJ
NDL
POS
MJ
2
32.5
42-75
3
480
2
35
43-75
2
480
2
32.5
43-75
2
470
2
30
43-75
2
470
2
30
43-75
2
460
1.5
30
42-75
2
460
301 …
750 m
(988 …
2,461 ft)
ASO
IJ
NDL
POS
MJ
2
32.5
42-75
3
490
2
35
43-75
2
490
2
32.5
43-75
3
470
2
32.5
43-75
2
470
2
30
43-75
2
470
2
30
43-75
2
460
0 …
300 m (0
… 984 ft)
ASO
IJ
NDL
POS
MJ
2
32.5
42-75
3
490
2
35
43-75
2
490
2
32.5
43-75
2
480
2
32,5
43‑75
2
470
2
30
43-75
2
470
2
30
43-75
2
460
ASL Sea level
TEMP Temperature
ASO Idle air adjusting screw open
IJ Idling jet
NDL Needle
POS Needle position from top