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SPECIFICATION

3645SA-SB
front carb. all

3646S
rear carb. a/t

3634S
rear carb. s/m/t

3924S-SA
rear carb. m/t

3925S-SA
rear carb. m/t

4050S
front carb. m/t

4051S
rear carb. m/t

Thro. Bore Prim. & Sec. Size 1 9/16" (P)
1 11/16" (S)
1 9/16" (P)
1 11/16" (S)
1 9/16" (P)
1 11/16" (S)
1 9/16" (P)
1 11/16" (S)
1 9/16" (P)
1 11/16" (S)
Main Venturi Prim & Sec. Size 1 3/16" (P)
1 9/16"(S)
1 3/16" (P)
1 9/16"(S)
1 3/16" (P)
1 9/16"(S)
1 3/16" (P)
1 9/16"(S)
1 3/16" (P)
1 9/16"(S)
Vents in Air Horn & Body Amt. 13 13 13 13 13
Low Speed Jet in Prim. Venturi Size .031 .031 .031 .031 .031
By-Pass in Prim. Venturi Size .0453 .040 .0452 .0452 .040
Econ. in Prim. Venturi Size .043 .043 .043 .043 .043
Idle Bleed in Prim. Venturi Size .0465 .0465 .0465 .0465 .0465
Idle Port & Restr. Jet Size .150x .030
.0275 Jet
.150x .030 .150x .030
x .051
.180x .030
x .051
.150x .030
Anti-Per Bleed in Prim. & Sec. Venturi Size .036 (P)
.031 (S)
.036 (P)
.031 (S)
.036 (P)
.031 (S)
.036 (P)
.031 (S)
.036 (P)
.031 (S)
Main Vent Tube Prim. & Sec. Venturi Amt. Side Holes 6 (P)
3 (S)
6 (P)
3 (S)
6 (P)
3 (S)
6 (P)
3 (S)
6 (P)
3 (S)
Sec. Pick Up Tube (T) & Discharge Port (P); Bleed (B) Size .052 (P)
.0292 (S)
.052 (P)
.0292 (S)
.052 (P)
.0292 (S)
.052 (P)
.0292 (S)
.052 (P)
.0292 (S)
Pump Jet in Prim. Venturi Size .028 .028 .028 .028 .028
Choke Setting No Choke Index Index Index Index
Vacuum Spark Port Size none .130 X .040 .130 X .040 .130 X .040 .130 X .040



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