Getting There...
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Technical Information

ENGINE CALCULATOR
GEAR RATIO CALCULATOR
TIRE SIZE CALCULATOR

General Jetting Chart for Weber Carbs

NOTE: Drill 2.00 Hole in each
Throttle Valve of Single Carb

40 IDF

Factory
Sizes

Single
Carb

Dual
Carbs

AIR CORRECTION

2.00

1.60

2.00

EMULSION TUBE

F-11

 

 

MAIN JET

1.15

1.45

1.30

PUMP JET

.50

.80

.50

IDLE JET

.50

.65

.55

VENTURII

28mm

 

 

44 IDF

Factory
Sizes

Single
Carb

Dual
Carbs

AIR CORRECTION

1.75

1.65

2.00

EMULSION TUBE

F-11

 

 

MAIN JET

1.35

1.60

1.55

PUMP JET

.50

.80

.50

IDLE JET

.50

.65

.55

VENTURII

36mm

 

 

48 IDF

Factory
Sizes

Single
Carb

Dual
Carbs

AIR CORRECTION

1.80

1.80

2.00

EMULSION TUBE

F-2

 

 

MAIN JET

1.50

1.70

1.75

PUMP JET

.50

.80

.50

IDLE JET

.55

.65

.60

VENTURII

40mm

 

 

34 ICT

Factory
Sizes

Single
Carb

Dual
Carbs

AIR CORRECTION

1.60

N/A

1.60

EMULSION TUBE

F-78

N/A

 

MAIN JET

1.30

N/A

1.35

PUMP JET

.50

N/A

.50

IDLE JET

.52

N/A

.60