PIAGGIO B 250 - Page 14

Specification Desc./Quantity
Starter diffuser jet 130
Starter jet 50
Starter pin diameter Ø 1,78
Starter device resistance ~ 40 Ω
Venturi diffuser Ø 29 (30.3x27)
Throttle valve Ø 33
Choke maximum cone Ø 48,0
250cc Version
Keihin
KEIHIN CARBURETTOR 250
Specification Desc./Quantity
Depression type CVEK30
Printing on the body CVK
CUT-OFF device Present
Max jet 100
Minimum jet 38
Max. air jet 70
Minimum air jet 115
Idle mixture adjustment screw initial opening 2½ ± ¼
Conical pin Ø 2,530
Diffuser nozzle Ø 2.8
Starter air jet Ø 1,5
Starter jet 42
Starter device resistance ~ 20 Ω
Venturi choke Ø 29
Throttle valve Ø 30,5
Choke maximum cone Ø 47
Walbro
WALBRO CARBURETTOR250
Specification
Desc./Quantity
Depression type WVF-7S*
Printing on the body 7S
CUT-OFF device Present
Max. jet 118
Minimum jet 34
Max. air jet 150
Minimum air jet 31
Throttle valve spring 120 g
Idle mixture adjustment screw initial opening 3 ± ½
Conical pin 465
Conical pin top notches 3
Diffuser nozzle Ø 2.7
Gasoline inlet hole Ø 1.5
Starter air jet 200
Starter diffuser jet 130
Starter jet 50
Starter pin diameter Ø 1,78
Starter device resistance ~ 40 Ω
Venturi diffuser Ø 29 (30.3x27)
Throttle valve Ø 33
Choke maximum cone Ø 48,0
*The identification letter can vary every time the carburettor is updated.
Characteristics B 125-250
CHAR - 14