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Workshop manual RR 4T - 400 - 450 - 525
SPECIFICATIONS - ENGINE
CARBURETTOR TUNING
400/450 525
Carburettor type Keihin FCR-MX 39 Keihin FCR-MX 39
Carburettor code 3900A 3900B
Main jet 178 178
Jet needle OBDVR OBDVT
Idling jet 42 42
Main air jet 200 200
Idling air jet 100 100
Needle valve position 3. 3.
Starting jet 85 85
Fuel mixture adj. screw open by 1,25 turns 1,25 turns
Throttle valve 15 15
Power reduction throttle valve stop throttle valve stop
Pump diaphragm stop 858 / 2,15 mm 858 / 2,15 mm