Hercules Speed Versions

 

Hercules Mopeds Speed Versions

Sachs 505/1 A,B,D specs
from 1980 Repair Manual

For Hercules mopeds, made from 1975 to 1980, that sold new in the USA, here are the things that determine the speed version: cylinder-and-crankcase, exhaust header pipe, intake pipe, carburetor, air filter cover, and rear sprocket.

Exhaust header 20 OD
20 x 350 exposed outer
20 x 250 inside muffler

Ex. Header 26-24 OD
26 x 400 exposed outer
24 x 200 inside muffler

Exhaust Header 26 OD
26 x 360 exposed outer
26 x 100 inside muffler

 

 

 

 

 

How to tell: The cylinder says “25km” or “45km”. The cylinder head fins are either slanted (A,B) or straight (D). The exhaust front pipe is thick or thin. The carburetor says “85/10…” or 85/12…”. The air filter inlet hole is big or small. The rear sprocket is big or small. Find the model row in the table that has the same sizes and ID numbers, to determine what speed version your Hercules moped is.

This information was not easily available. Sources are all factory manuals, parts, service, and owners.

US-models
sheet frame:
Engine
Power
Cylinder
Version
Intake
ID mm
Bing
Carburetor
Air filter
inlet ID
Ignition
timing
Header
pipe OD
Sprockets
Tires
1977-78 P1
1978-79 Westlake
17mph
504/1B
25km 12.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 50T
2.00 - 17
1975-78 P1
1978-79 Westlake
20mph
504/1B-A
1.5 hp
25km 14.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 50T
2.00 - 17
1977-78 P1
1978-79 Westlake
25mph
504/1A-B
1.5 hp
40km 12.0 85/12/101
#52 jet
16mm 2.5-3mm
(25-28°)
26-24 11 x 38T
2.00 - 17
1977-78 P1
1978-79 Westlake
30mph
504/1A-A
1.8 hp
40km 14.0 85/12/101
#52 jet
16mm 2.5-3mm
(25-28°)
26-24 11 x 38T
2.00 - 17
1979-80 Sundancer
20mph
504/1B
1.0 hp
25km 14.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 50T
2.25 - 17
1979-80 Sundancer
25mph
504/1A
1.5 hp
40km 14.0 85/12/101A
#52 jet
16mm 2.5-3mm
(25-28°)
26-24 11 x 45T
2.25 - 17
1979-80 Sundancer
30mph
504/1D
2.0 hp
14.5 85/12/104A
#58 jet
16mm 1.5-2mm
(19-22°)
26-26 11 x 45T
2.25 - 17
1979-80 Seville
20mph oil injection
504/1B-I
1.0 hp
25km 14.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 50T
2.25 - 17
1979-80 Seville
25mph oil injection
504/1A-I
1.5 hp
40km 14.0 85/12/101A
#52 jet
16mm 2.5-3mm
(25-28°)
26-24 11 x 45T
2.25 - 17
1979-80 Seville
30mph oil injection
504/1D-I
2.0 hp
14.5 85/12/104A
#58 jet
16mm 1.5-2mm
(19-22°)
26mm 11 x 45T
2.25 - 17

tube frame:
1975-77 M4
1978-79 Balboa
20mph
505/1B
1.5 hp
25km 14.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 50T
2.25 - 17
1977-78 M4
1978-79 Balboa
30mph
505/1A
1.8 hp
40km 14.0 85/12/101
#52 jet
16mm 1.5-2mm
(19-22°)
26mm 11 x 40T
2.25 - 17
1979-80 Suburban
1979-80 Prima
20mph
505/1B
1.5 hp
25km 14.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 50T
2.25 - 17
1979-80 Suburban
1979-80 Prima
25mph
505/1A
1.8 hp
40km 14.0 85/12/101A
#52 jet
16mm 2.5-3mm
(25-28°)
26-24 11 x 45T
2.25 - 17
1979-80 Suburban
1979-80 Prima
30mph
505/1D
2.0 hp
14.5 85/12/104A
#58 jet
16mm 1.5-2mm
(19-22°)
26mm 11 x 45T
2.25 - 17
1980-80 Prima G3
20mph
505/1B
25km 14.0 85/10/101
#50 jet
13mm 2.5-3mm
(25-28°)
20mm 11 x 46T
2.50 - 17
1980-80 Prima G3
25mph
505/1A
40km 14.0 85/12/101A
#52 jet
16mm 2.5-3mm
(25-28°)
26-24 11 x 46T
2.50 - 17
1980-80 Prima G3
30mph
505/1D
14.5 85/12/104A
#58 jet
16mm 1.5-2mm
(19-22°)
26mm 11 x 46T
2.50 - 17