Horsepower versions: There were three horsepower (speed) versionson ’75 to ’86 US-model Puch mopeds, 1.0 hp (20 mph), 1.5 hp (25 mph) and 2.0 hp (30 mph). Each US state had a different speed and power limit. A sticker on each side cover said the power (speed) version, but nowhere else did. Without that, the power version can be determined by inspection or measurement of each part and matching that to the specs in the chart below. The carburetor ID number is the easiest and most useful way to find the power version in the chart.
Top End Versions: There were four different top end versions, 7-fin ’75-85 Maxi, 8-fin ’78-86 Maxi Hi-Torque, 9-fin ’78-82 Magnum, and 10-fin ’83-86 Maxi Plus.
1975-86 Models and Model Codes: Here the Puch models that share the same speed version parts are grouped together and given codes, to abbreviate and simplify the speed versions list. Fifteen Puch Parts Catalogs (14 shown) cover the 11-12 year range of US-model mopeds. Not included are pre-1975 US-model Puch mopeds and motorcycles sold by Sears. Also not included are Puch remakes made after 1987 in Italy, Slovakia and Turkey.
code catalog power models colors: 7-fin, 8-fin, 9-fin, 10-fin
75 Jul 76 
1.0-2.0 ’75-76 Maxi-N, Maxi-S, Nostalgic
76 Oct 76
1.0-2.0 ’76-77 Rigid, Maxi, Maxi Sport, Newport
78 Mar 78
1.0-2.0 ’78 GN, Maxi
78r Mar 78
1.0 hp ‘78 Maxi Luxe, Sport MkII, Newport
78L Mar 781.5-2.0 ’78 Maxi Luxe, Sport, Sport MkII, Newport
78s Jan 78
1.0-2.0 ’78 Sears Free Spirit
78M Jul 78
1.0-2.0 ’78 Magnum XK, Magnum MkII
79 Jan 79
1.0-2.0 ’79 GN, Maxi
79r Jan 791.0 hp ‘79 Maxi Luxe, Sport MkII, Newport L, Maxi II
79L Jan 79 1.5-2.0 ’79 Maxi Luxe, Sport, Sport MkII, Newport L
79L Jan 79 1.5-2.0 ’78-79 Maxi II
79M Aug 79
1.0-2.0 ’78 Magnum XK, Magnum MkII
80 Jan 80
1.0-2.0 ’80-83 Maxi
80r Jan 801.0 hp ‘80-83 Maxi Luxe
80L Jan 801.5-2.0 ’80-83 Maxi Luxe, Sport MkII, Newport II
80M Jan 80
1.0-2.0 ’80-82 Magnum MkII
80M Jan 801.0-2.0 ’80-81 Magnum II
81 Apr 81
1.5-2.0 ‘80-82 Series B
81M Feb 81
1.0-2.0 ’81-82 Magnum LTD
83D Jan 831.5-2.0 ’83-84 Dart
84 Jan 84
1.0-2.0 ‘84-85 Maxi, Maxi Sport LS (to 2421596)
84L Jan 841.5-2.0 ’84-85 Maxi Luxe, Sport MkII, Newport II
84S Jan 841.5-2.0 ’84-85 Maxi Sport LS (2421597 on)
84A Jan 84
1.5-2.0 ’84-85 Austro-Daimler (Maxi Plus) I, II
85S Jan 85
1.5-2.0 ’85-86 Maxi Sport LS 2-Speed
86C Jan 86
1.5-2.0 ’85-86 Cobra, Cobra 2-Speed
1975-86 Puch Speed Versions
How to upgrade to 2.0 hp specification:
This procedure is only for bikes where all of the parts are original.
1. Indentify the year and model of your bike. The year is on the ID plate. Here they are shown and explained.
2. Look up your bike’s parts catalog and model code in the list above.
3. Then for each part in the list below, look at the color of the Puch part number for that model code. Green means the part is the same as on 2.0 hp versions. Black means it is not the same as on 2.0hp versions.
4. Change all of the parts with black part numbers to green specification, either by replacement or modification.
5. Unfortunately not all of the part specifications are known.
Speed Version Columns: 1 means the part is for that version. 0 means it is not.
1 means 1.0 horsepower, 20 mph
1 means 1.5 horsepower, 25 mph
2 means 2.0 horsepower, 30 mph
112 0-fin 000.000.1111 color on models cylinder head
100 7-fin 349.410.0011 silver 75, 76, 78, 79, 80, 84
100 7-fin 349.210.2011 black 78r, 79r, 80r
011 7-fin 349.410.0011 silver 75, 76, 78, 79, 80, 81
011 7-fin 325.110.0011 silver 84
011 8-fin 349.310.4011 black 78L, 79L, 80L, 79L
010 8-fin 349.810.4011 black 84L
010 8-fin 349.710.4011 silver 86C
011 8-fin 349.110.4011 silver 85S, 84S
001 8-fin 349.110.4011 silver 86C
111 9-fin 328.410.4011 black 78M, 79M, 80M
111 9-fin 328.710.4011 black 80M
010 10fin 345.110.1011 silver 84A
001 10fin 345.110.0011 silver 84A
112 0-fin 000.000.0000 mm on models head gasket
100 7-fin 349.110.0041 0.4 75, 76, ’78-79 Sport MkII
100 7-fin 328.110.8041 1.5 78, 79, 80, 84 ’78-79 Maxi Luxe, Sport, Newport
011 7-fin 349.110.0041 0.4 75, 76, 78, 79, 80, 81, 84
010 7-fin 328.110.8041 1.5 84S
010 8-fin 000.000 none 0.0 78L,
010 8-fin 328.110.8041 1.5 79L, 79L, ’80-83 Newport II
010 8-fin 349.310.0041 0.8 86C
001 8-fin 000.000 none 0.0 78L, 79L, 79L, ’80-83 Newport II
001 8-fin 349.110.0041 0.4 85S, 86C
010 9-fin 328.110.8041 1.5 78M, 79M, 80M, 80M
001 9-fin 349.110.0041 0.4 78M, 79M, 80M, 80M
010 10fin 349.310.0041 0.8 83D, 84A
001 10fin 349.110.0041 0.4 83D, 84A
None of these cylinders need a head gasket. New 8-fin ’78-83 2.0 hp models did not come with head gaskets. Remove the head gasket to upgrade to 2.0 hp specification. That provides a slight increase in compression ratio by reducing the combustion chamber volume.
112 0-fin 000.000.0000 pin-hi-lo oil
112 0-fin 000.00000 rings pin-hi-lo holes on models piston
100 7-fin 349.110.0060 N 12-17-26 2 75, 76
100 7-fin 349.110.0069 N 12-17-26 4 78
011 7-fin 349.110.1060 N 12-17-21 2 75, 76
011 7-fin 349.110.1069 N 12-17-21 4 78, 79, 80, 81
011 8-fin 350.310.0069 N 12-17-23 ? 78L
011 8-fin 349.210.5069 L 12-17-23 ? 79L, 80L
011 9-fin 350.310.0069 N 12-17-23 ? 78M
011 10fin 345.110.0069 1 12-17-23 4 84A
The 1.0 hp pistons have a 5 mm longer skirt (bottom). That causes the intake port to open later and close sooner (less duration). Also some of the port is still blocked by the piston even at maximum opening (less area). It’s a simple matter to file or grind 5 mm off of the intake side piston skirt, to make it 21 mm from the bottom edge of the pin, the same as 2.0 hp specification.
112 0-fin 000.000.0000 cylinder with piston
100 7-fin 349.810.0050 ’75-78 silver 75, 76, 78, restricted intake port
100 7-fin 349.310.0050 ’78-78 black 78L, restricted intake port, black
100 7-fin 349.310.2050 ’79-79 black 79L, restricted intake port, black
011 7-fin 349.110.0050 ’75-78 silver 75, 76, 78,
011 8-fin 349.310.4050 ’78-78 black
011 8-fin 349.610.4050 ’79-82 black
011 8-fin 349.110.6050 ’83-84 silver
011 8-fin 349.210.6050 ’84-86 silver Cobra, Sport LS2
011 10fin 334.110.0050 ’84-86 black 84A
112 0-fin 000.000.0000 mm base gasket
100 7-fin 349.310.0131 0.5 ’74-86
011 7-fin 349.110.0131 1.0 ’74-86
112 fins 000.000.0000 mm 00 jet carburetors 14 mm
011 7 349.415.5000 1/14/152 64 ’75-76 Maxi-N, Maxi-S, Nostalgic
001 7 ???.???.???? 1/14/157 ?? ’78-79 JC Penney Swinger
001 7 349.815.5000 1/14/160 64 ’76-77 Rigid, Maxi, Maxi Sport, Newport
001 7 349.815.5000 1/14/160 64 ’78-79 GN, ’78-79 Maxi to 7705425
001 7 ???.???.???? 1/14/163 68 ’78 Sears Free Spirit
001 7 349.115.6000 1/14/??? 68 ’80-82 Series B
110 7 ???.???.???? 1/14/164 52 ’78 Sears Free Spirit
010 7 349.915.5000 1/14/??? 52 ’80-82 Series B
001 7 ???.???.???? 1/14/166 62 ’80-81 Murray
001 7 349.815.6000 1/14/185 64 ’79-83 Maxi from 7705426
001 7 349.815.6000 1/14/185 64 ’84-85 Maxi Sport LS to 2421596
011 8 349.515.5500 1/14/196 68 ’85-86 Cobra
001 8 349.515.5500 1/14/196 68 ’85-86 Cobra 2
010 8 349.315.6500 1/14/203 70 ’85-86 Cobra 2
112 fins 000.000.0000 mm 00 jet carburetors 12 mm
000 0 ???.???.???? 1/12/279 ?? modern remake
100 7 349.215.4000 1/12/292 54 ’75-76 Maxi-N, Maxi-S, Nostalgic
100 7 349.215.4000 1/12/292 54 ’76-77 Rigid, Maxi, Maxi Sport, Newport
100 7 349.215.4000 1/12/292 54 ’78 Maxi Luxe, Sport, Newport
010 7 349.315.4000 1/12/293 60 ’76-77 Rigid, Maxi, Maxi Sport, Newport
010 7 349.315.4000 1/12/293 60 ’78-79 GN, ’78 Maxi
010 7 349.315.4000 1/12/293 60 ’79 Maxi to 7705250
001 8 349.315.4000 1/12/293 60 ’78 Maxi Luxe, Sport, Newport
100 7 349.415.4000 1/12/294 54 ’76-77 Rigid, Maxi, Maxi Sport, Newport
100 7 349.415.4000 1/12/294 54 ’78-79 Maxi Luxe, Sport, Newport L
100 7 349.415.4000 1/12/294 54 ’80-85 Maxi, Maxi Luxe
100 9 349.715.7000 1/12/297A 50 ’80-83 Magnum MkII, II, LTD
000 0 ???.???.???? 1/12/299 ?? unknown
100 7 349.815.4000 1/12/300 48 ’78-79 Sport MkII, ’79 Maxi II
100 7 349.815.4000 1/12/300 48 ’80-85 Sport MkII, Newport II
100 7 ???.???.???? 1/12/302 50 ’78-79 JC Penney Swinger
010 8 349.115.7000 1/12/304 66 ’78 Maxi Luxe, Sport, Newport
001 8 349.215.7000 1/12/307 60 ’78 Sport MkII
010 7 349.215.7000 1/12/307 58 ’80-84 Maxi from 7705251
011 7 349.215.7000 1/12/307 58 ’85 Maxi Sport LS from 2421597
001 8 349.215.7000 1/12/307 58 ’80-85 Maxi Luxe
011 8 349.215.7000 1/12/307 58 ’85 Maxi
010 8 349.615.7000 1/12/309 48 ’80-85 Maxi Luxe
010 9 349.615.7000 1/12/309 48 ’80-83 Magnum MkII, II, LTD
010 8 349.615.7000 1/12/310 48 ’79 Maxi Luxe, Sport, Newport L
001 8 349.315.8000 1/12/314 60 ’79 Sport MkII, Maxi II
001 8 349.315.8000 1/12/314 60 ’80-85 Sport MkII, Newport II
011 8 349.315.8000 1/12/314 60 ’85-86 Maxi Sport LS 2
001 9 349.415.8000 1/12/316 64 ’78-79 Magnum XK
010 9 349.515.8000 1/12/317 50 ’78-78 Magnum XK
001 9 349.615.8000 1/12/318 50 ’78-79 Magnum XK, Magnum MkII
010 8 349.815.7000 1/12/321 60 ’79 Sport MkII, Maxi II
010 7 349.815.7000 1/12/321 60 ’78-79 JC Penney Pinto, Swinger
010 8 349.815.7000 1/12/321 60 ’80-85 Sport MkII, Newport II
001 9 349.715.8000 1/12/322 64 ’78-79 Magnum MkII
001 9 349.715.8000 1/12/322 64 ’80-83 Magnum MkII, II, LTD
010 9 349.815.8000 1/12/323 50 ’78-79 Magnum MkII
010 10 ???.???.???? 1/12/339 52 ’83-84 Dart
001 10 ???.???.???? 1/12/340 54 ’83-84 Dart
010 10 345.315.6000 18/12/106 52 ’84-85 Maxi Plus 1 and 2
001 10 345.415.6000 18/12/107 54 ’84-85 Maxi Plus 1 and 2
Identification: Use this list to identify the bike model and speed version from knowing the year and carburetor ID number.
Jet Size: Intake air restrictors located in the air filter box, before the carburetor, cause the jet size to be much smaller. Intake air restrictors located in the intake port or intake pipe, after the carburetor, cause the jet size to be the same or only slightly smaller. Besides the intake pipe and air filter box, other things that affect the jet size on a piston-port two-stroke engine are piston, cylinder, exhaust, and to a lesser degree, head and gaskets.
112 000.000.0000 fig# air filter for sheet frame
110 349.315.0700 20 75 76 78 78r 78L 79 79r 79L 80 80r 80L
011 349.115.0700 10 75, 76
001 349.115.0700 10 78 78L 79 79L 80 80L
112 000.000.0000 fig# air filter for tube frame
010 321.215.2700 40 81
001 321.415.2700 30 81
112 0-fin 000.000.0000 mm intake pipe
100 7-fin 349.215.1301 12 ’74-76 round
100 7-fin 349.215.3301 12 ’77-86 round
100 7-fin 321.415.6301 12 ’78-86 round tall for 2-speed
011 7-fin 349.115.1301 14 ’74-86 rectangular
112 0-fin 000.000.00 pipe-ring-holes exhaust front pipe 1-speed
100 7-fin 349.416.0012 18-26-1 ’75-86 Maxi, Maxi Luxe
010 7-fin 349.116.8012 22-26-1 ’76-86 Maxi,
010 8-fin 349.916.0012 22-26-1 ’78-79 Maxi Luxe
010 8-fin 349.816.0012 22-26-1 ’80-86 Maxi Luxe
010 8-fin 349.516.7012 22-22-1 ’84-85 Maxi Sport LS
010 8-fin 349.816.7012 22-22-1 ’85-86 Maxi Sport LS from 2421897
011 7-fin 321.216.7012 22-26-2 ’81-82 Series B
010 8-fin 322.216.2012 22-22-1 ’85-86 Cobra, Cobra 2
001 7-fin 349.616.0012 22-26-4 ’76-86 Maxi, Maxi Luxe
001 8-fin 349.116.9512 22-22-4 ’84-85 Maxi Sport LS
001 8-fin 349.616.7012 22-22-4 ’85-86 Maxi Sport LS from 2421597
001 8-fin 322.116.2012 22-22-4 ’85-86 Cobra, Cobra 2
112 0-fin 000.000.00 pipe-ring-holes exhaust front pipe 2-speed
1.0 8-fin 349.516.6012 18-26-1 ’78-86 Sport MkII, ’80-86 Newport II
010 8-fin 349.616.6012 22-26-1 ’78-86 Sport MkII, ’80-86 Newport II
010 8-fin 321.316.5012 22-22-1 ’85-86 Maxi Sport LS 2
001 8-fin 321.416.6012 22-26-4 ’78-86 Sport MkII, Newport II
001 8-fin 321.616.5012 22-22-4 ’85-86 Maxi Sport LS 2
The 2-speed exhaust front pipe is about 14mm longer than a 1-speed front pipe, because the front of the engine case is farther forward, to make room for the extra shaft in the 2-speed transmission.
112 000.000.000 teeth front sprocket plain
100 000.561.1322 13x45T ’75-77 1-speed models
010 349.113.0141 14x45T ’75-77 1-speed models
001 349.113.0161 16x45T ’75-77 1-speed models
112 000.000.000 teeth front sprocket rubber coated
100 000.150.1036 11x45T ’78-86 1-spd New York
100 349.113.1132 13x45T ’78-86 1-speed models
010 349.113.1142 14x45T ’78-86 1-speed models
010 349.113.1152 15x45T ’79-86 1-speed models
001 349.113.1152 15x45T ’85-86 Maxi 7736973-on
001 349.113.1162 16x45T ’78-85 1-speed models
011 349.113.1182 18x40T ’78-86 2-speed models
