Carburetor; All Sx Models; Carburetor - Basic Setting For Sandy Surfaces (All Sx Models) - KTM 250 SX 2018 Owner's Manual

21 TECHNICAL DATA
21.3

Carburetor

21.3.1

All SX models

Carburetor type
Carburetor identification number
Needle position
Jet needle
Main jet
Idling jet
Starting jet
Needle jet
Idle air adjusting screw
Open
21.3.2

Carburetor - basic setting for sandy surfaces (All SX models)

Idle air adjusting screw
Open
Idling jet
Jet needle
Needle position
Main jet
Info
If the engine is not running smoothly, use a smaller main jet.
MIKUNI TMX 38
TMX 38 84
3rd position from top
6BFY43-73 (6BFY44-73)
440 (430, 450, 460)
42.5 (37.5 / 40 / 45 / 47.5)
80
S‑1
1.5 turns
1.5 turns
45
6BFY44‑73
3rd position from top
470
108