Contents:
1. Ducati/Zem magnetos on Tomos
2. Ducati magnetos on Minarelli
3. Ducati magnetos on other makes
1. Ducati Magnetos on Tomos
Tomos mopeds have been equipped with Ducati, ZEM, CEV, IDM, Iskra, AET magnetos. ZEM is a remake or a rename of Ducati (DEM Ducati Elettrotecnica Microfarad).
Ducati or ZEM 31.17.11 magneto-generator is a 2-wire internal ignition ground type for countries that do not require a brake light.
Ducati or ZEM 31.17.30 magneto-generator is a 3-wire external ignition ground type for countries like the US that require a brake light. Like many other US-model moped magnetos, the brake light is powered by the ignition source coil ground. This was to meet the US DOT requirement that the headlight not get dim when the brake light was on. The two-coil generator has three outputs, the black ignition wire from the points to the spark coil, the blue ignition ground wire that is grounded through the brake light or brake light switches, and the yellow light wire the provides 6V AC 30 watts for light and horn.
Tomos US models in 1974 to 1985 had this type of magneto, with the brake light switches wired in series and normally closed when installed. If you removed the tail light and squeeze either brake, the engine would die. Starting in 1986 Tomos improved the electrical system with a solid-state-regulated single lighting yellow wire, a ignition black wire, and an internal ignition ground. So the engine never dies, on a 1986 and later Tomos with the 2-wire Iskra magneto, when the tail light wires are unplugged and the brake is applied. When the magneto type changed from 1985 to 86, the wiring also changed.
These Ducati and ZEM complete magnetos, with 94mm ID flywheel and 90mm 3-bolt stator, will interchange with 90mm ID flywheel and 90mm 3-bolt stator Bosch complete magnetos and other Bosch compatibles like Iskra, except for the width and position of the key groove that determines the ignition timing.
These are counterclockwise ⇐left rotation. Points are M14 CEV type “right hand” (the brown part looks like your right hand sideways with fingers bent). The Ducati base plate has a 17.9mm condenser hole instead of 18.0. So the condenser is MMI# M17T which is the same as a modern M17. Source coils have M4 x 20 screws with 57 mm spacing.
31.17.11 ⇐94 116 90 ♦♦ 6V 30/10
on Tomos A3-EU ’74-85?
Tomos# price
221.309 $16.0 points M14
221.310 $13.0 condenser M17
700.334 $19.0 flywheel puller M26-1.5 thread
31.17.30 ⇐94 116 90 ♦♦♦ 6V 30/10 /10
on Tomos A3-US ’74-85 Ducati
Tomos# price See Tomos A3 Engine Parts section 7c.
221.309 $16.0 points M14
221.310 $13.0 condenser M17
027.053 $2.50 points screw M4 x 8 phil small
700.334 $19.0 flywheel puller M26-1.5 thread
213.733 $65.0 ignition coil (upper) 4×57 = CEV 04359
213.734 35-20 lighting coil (lower) 4×57 = CEV 04360
31.17.30 ⇐94 116 90 ♦♦♦ 6V 30/10 /10
on Tomos A3-US ’83-85 ZEM
Tomos# price See Tomos A3 Engine Parts section 7c.
221.309 $16.0 points M14
221.310 $13.0 condenser M17
700.334 $19.0 flywheel puller M26-1.5 thread
2. Ducati Magnetos on Minarelli
Ducati magnetos were on 1950’s to 1980’s Minarelli engines, along with CEV and Bosch.
Spark coil: Some have an internal spark coil with the spark plug wire coming from inside the engine. Most have an external spark coil with the spark plug wire coming from a coil outside the engine.
Specs and symbols:
⇐ is left (anticlockwise) rotation
⇒ is right (clockwise) rotation
80 is the flywheel inner diameter in mm
103 or 110 is the flywheel outer diameter
80 or 94 is the base plate outer diameter
Wires symbols:
♦ is a red wire for ignition
o is a thick spark plug wire
is no thick spark plug wire
♦ is a black wire for main lights
♦ is a purple wire for battery charging, from the lights coil
◊ is a white wire for battery charging, from the lights coil
♦ is a blue wire for brake light, from the ignition source coil
31.02.30 ⇐80 110 94 ♦♦ 6V 18w
on Minarelli P3, P4S, P4V, W3
Minarelli# price internal ignition ground, ext. spark coil
82.0012.9 none magneto =912301? =M16-12?
82.0212.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0018.6 none stator
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
07.0102.6 none ignition coil ♦
07.0411.6 none lights coil ♦
31.02.32 ⇐80 110 94 o♦ no lights 00
31.02.37 ⇐80 110 94 o♦♦ 6V 18w
on Minarelli P4 kit
Minarelli# price internal ignition ground, int. spark coil
=M42-208 none magneto
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
31.02.39 ⇐80 110 94 ♦♦ 6V 18w
on P4, P4V, P4E, P6, P6/4, P6R, W3
Minarelli# price internal ignition ground, ext. spark coil
82.0014.9 none magneto = 912401
82.0214.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0018.6 none stator
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
07.0102.6 none ignition coil ♦
07.0411.6 none lights coil ♦
31.02.74 ⇐80 110 94 ♦♦ 6V 18w 00
on Minarelli P6 potenza?
Minarelli# price internal ignition ground, ext. spark coil
82.0015.9 none magneto
82.0215.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0019.6 none stator
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
07.0102.6 none ignition coil ♦
07.0412.6 none lights coil ♦
31.02.77 ⇐80 110 94 ♦♦ 6V 18? 00
on Minarelli P4? P6?.
Minarelli# price internal ignition ground, ext. spark coil
82.0031.9 none magneto assy
82.0231.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0036.6 none stator assy
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
07.0116.6 none ignition coil ♦
07.0441.6?none lights coil ♦
31.03.61 ⇒80 103 80 o♦♦ 6V 18w 00
on Minarelli V1
Minarelli# price internal ign. ground, int. spark coil
82.0001.9 none magneto
82.0201.6 none flywheel ⇒ ∅80 x 103 steel
82.0025.6 none stator
82.0445.6 none base plate ∅80
82.0011.6 $16.0 points M18
82.0134.6 none condenser M17
07.0304.6 none ignition coil o♦
07.0404.6 none lights coil ♦
31.03.73 ⇒80 103 80 ♦♦ 6V 18w
on Minarelli V1, G1R
Minarelli# price internal ign. ground, ext. spark coil
82.0029.9 magneto
82.0229.6 flywheel ⇒ ∅80 x 103 steel
82.0029.6 stator
82.0445.6 base plate ∅80
82.0011.6 points
82.0134.6 condenser
07.0108.6 ignition coil
07.0404.6 lights coil
31.11.37 ⇐80 110 94 ♦♦ 6V? 00 00
on Minarelli P4, P6
’81 Fantic Cabalero 125RC
82.0058.9 internal ignition ground, ext. spark coil
31.12.37 ⇐80 110 94 ♦♦♦ 6V 00
on Minarelli P4R US
’78-88 Safari Commando (US)
Minarelli# price external ignition ground, ext. spark coil
82.0045.9 none magneto
82.0245.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0047.6 none stator ♦♦ 6V ??w
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
07.0127.6 none ignition coil ♦♦
07.0441.6 none lights coil ♦
31.12.38 ⇐80 110 94 ♦♦♦ 6V 25/10w
on P4S US, P6-70 US, P6CS US
Minarelli# price internal ignition ground, external spark coil
00.0000.0 none magneto assy
00.0000.0 none flywheel =31.12.50 ⇐ ∅80 x 110 aluminum
00.0000.0 none stator
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
00.0000.0 none ignition coil ♦
00.0000.0 none lights/brake coil ♦♦ 6V 25/10w
31.12.50 ⇐80 110 94 ♦♦♦ 6V 30/10? 00
on Minarelli 125#2
’73-74 Indian ME125
Minarelli# price internal ignition ground, ext. spark coil
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
31.12.54 ⇐80 110 94 ♦♦ 6V 00 00
on Minarelli P3? W3?
Minarelli# price internal ignition ground, ext. spark coil
82.0046.9 none magneto assy
82.0246.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0050.6 none stator
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
31.12.59 ⇐80 110 94 ♦♦ 6V 00
on Minarelli P3? W3? P4? P6?
Minarelli# price internal ignition ground, ext. spark coil
82.0052.9 none magneto
82.0252.6 none flywheel ⇐ ∅80 x 110 aluminum
82.0046.6 none stator ♦♦ 6V ??w
82.0440.6 none base plate ∅94
82.0006.6 $16.0 points M14
82.0132.6 $13.0 condenser M17 (requires M4x8 screw)
07.0126.6 none ignition coil ♦
07.0441.6 none lights coil ♦
Minarelli# price Parts for Sale.
05.0080.0 $19.0 flywheel puller M19-1.0 thread
49.0815.6 none points screw M4x6 small head slot use M4x8
49.0815.6 $2.50 points screw M4x8 small head phillips
49.0816.6 $0.70 coil screw M4x20 slot
82.0006.6 $16.0 points M14 for left rotation
82.0011.6 $16.0 points M18 for right rotation
82.0132.6 $13.0 condenser ∅17.9 M17T = modern M17
82.0134.6 none condenser ∅17.9? no mount flange
82.0181.6 none greasing felt
82.0440.6 none base plate bare ∅94
82.0445.6 none base plate bare ∅80
3. Ducati Magnetos on other makes
Ducati# 0 rot id od od wires V w Other engines
magneto# ignition source coil type, spark coil type
31.03.27? ⇐80 110 94 ♦♦ 6V 18? Malanca Zeta Canada model
The number is not completely readable.
31.03.38 ⇐80 110 94 ♦♦ 6V 18? unknown app.
31.03.47 ⇐80 110 94 ♦♦ 6V 18? Morini UC4 50
internal ignition ground, external spark coil