KTM 300 EXC User Manual

22 TECHNICAL DATA
138
22.3 Carburetor
Carburetor type MIKUNI TMX 38
Carburetor identification number TMX 38 86
Needle position 3rd position from top
Jet needle 6BFY43-73 (6BFY42-73, 6BFY42-74, 6BFY43-74)
Main jet 470 (460, 480, 490)
Idling jet 35 (32.5/37.5/40)
Choke nozzle 80
Needle jet S-4
Idle air adjusting screw
Open 2 turns
Throttle slide 4
22.3.1 Carburetor tuning
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
2.5
32.5
43-73
3
470
2.5
30
43-73
3
460
2
32.5
42-73
3
460
2
30
42-73
3
450
2
30
43-73
2
450
1,501 …
2,300 m
(4,925 …
7,546 ft)
ASO
IJ
NDL
POS
MJ
2
35
43-73
3
470
2.5
32.5
43-73
3
470
2.5
30
43-73
3
460
2
32.5
42-73
3
460
2
30
42-73
3
450
2
30
43-73
2
450
751 …
1,500 m
(2,464 …
4,921 ft)
ASO
IJ
NDL
POS
MJ
2
35
43-73
3
480
2
35
43-73
3
470
2.5
32.5
43-73
3
470
2.5
30
43-73
3
460
2
32.5
42-73
3
460
2
30
42-73
3
450
301 …
750 m
(988 …
2,461 ft)
ASO
IJ
NDL
POS
MJ
2
37.5
43-73
3
490
2
35
43-73
3
480
2
35
43‑73
3
470
2.5
32.5
43-73
3
470
2.5
30
43-73
3
460
2
32.5
42-73
3
460
0 …
300 m (0
… 984 ft)
ASO
IJ
NDL
POS
MJ
2
40
43-73
3
500
2
35
43-73
3
480
2
35
43-73
3
470
2.5
32.5
43-73
3
470
2.5
30
43-73
3
460
2
32.5
42-73
3
460
ASL Sea level
TEMP Temperature
ASO Idle air adjusting screw open
IJ Idling jet
NDL Needle
POS Needle position from top

KTM 300 EXC Specifications

General

Displacement	293.2 cc
Bore x Stroke	72 mm x 72 mm
Starter	Electric starter
Transmission	6-speed
Cooling	Liquid cooled
Front Suspension	WP XPLOR-USD, Ø 48 mm
Front Brake	Disc brake
Rear Brake	Disc brake
Ground Clearance	370 mm
Seat Height	960 mm
Engine Type	2-stroke
Rear Suspension	WP Xplor PDS
Frame	Central double-cradle type 25CrMo4 steel
Fuel Tank Capacity	Approx. 9 l