KTM 450 SMR - Manual (Page 75)

TECHNICAL DATA - CARBURETOR
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Carburetor type KEIHIN FCR-MX 41
Carburetor identfication number 4125I
Needle position 4th position from top
Idle mixture adjusting screw
Open 1.5 ‘turns
Pump membrane stop 2.15 ‘mm (0.08‘in)
Hot start button
Diameter of bore in carburetor body 2.5 ‘mm (0.1‘in)
Main jet 185
Jet needle OBDTR
Idling jet 42
Main air jet 200
Idle air jet 100
Cold start jet 85
Throttle slide 15