Carburetor; Basic Carburetor Setting For Sandy Surfaces; Carburetor Tuning - KTM 85 SX 2022 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

Basic carburetor setting for sandy surfaces

Idle air adjusting screw
Idling jet
Jet needle
Needle position
Main jet
Info
If the engine is not running smoothly, use a smaller main jet.
20.3.2

Carburetor tuning

KEIHIN PWK 28
−20 ... −7 °C
ASL TEMP
(−4 ... 19 °F)
ASO 2
2,301 ...
IJ 48
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
NDL NRJ C
(988 ...
POS 4
2,461 ft)
MJ 148
KEIHIN PWK 28
3rd position from top
2 turns
142 (140, 145, 148)
NRKC (NRJC)
48 (45, 50)
3
62
2 turns
48
NRJ C
4th position from top
148
−6 ... 5 °C
6 ... 15 °C
(21 ... (43 ...
41 °F) 59 °F)
2 1.5
45 42
NRK C NRK C
3 3
142 140
2 2
48 45
NRK C NRK C
3 3
142 142
2 2
48 48
NRK C NRK C
3 3
145 142
1.5 2
48 48
NRK C NRK C
3 3
148 145
TECHNICAL DATA 20
16 ... 24 °C 25 ... 36 °C
(61 ... (77 ...
75 °F) 97 °F)
2 1.5
42 42
NRK C NRJ C
3 3
138 138
1.5 2
42 42
NRK C NRK C
3 3
140 138
2 1.5
45 42
NRK C NRK C
3 3
142 140
2 2
48
45
NRK C NRK C
3 3
142 142
37 ... 49 °C
(99 ...
120 °F)
1.5
42
NRJ C
3
138
2
42
NRK C
3
138
1.5
42
NRK C
3
140
117