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Author Topic: Oilhead ignition coil  (Read 96 times)

Offline Bob_Roller

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Oilhead ignition coil
« on: June 11, 2022, 04:47:30 PM »
My oilhead quit on me Thursday on the way home 2 miles from work and 110 F, 43 C .
A disastrous story of getting roadside  emergency towing, only took them 8 hours to get to me !!!
I did a little bit of troubleshooting today after work .
I pulled a sparkplug lead off and put a spare plug on it .
Got a fat reddish orange spark, so I'm thinking the coil is bad .
Can't find my oilhead manual cd, so anyone have access to one if so what are the resistance values for the primary and secondary circuitsof the coil .
I had it loaded on my previous computer, but neglected to load it on this one .
Found the cd, only info in the manual, connect coil to BMW test equipment !!!!
No values are there .
« Last Edit: June 11, 2022, 04:53:54 PM by Bob_Roller »
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Justin B.

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Re: Oilhead ignition coil
« Reply #1 on: June 12, 2022, 09:32:43 PM »
Dang.  Can you determine what kind of ignition amplifier is used?  If you can you might be able to do some research and find some nominal values.
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!

Offline Bob_Roller

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Re: Oilhead ignition coil
« Reply #2 on: June 12, 2022, 11:48:20 PM »
I found some technical info on the Euro Motoelectric site.
A replacement coil for this bike has .6 ohm primary and 7.2k ohms for the secondary .
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Bob_Roller

  • Global Moderator
  • Mt. Olympus Resident
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Oilhead ignition coil
« Reply #3 on: June 14, 2022, 09:16:28 PM »
Got the coil removed, had to wait until I could drain the fuel out of the oilhead and put it other vehicles.
The primary checked good at .6 ohms, the secondary was open .
I've got a replacement coil and ignition leads on order from Euromoto Electric, along with some odds and ends I can use .
From the wiring diagram I have the engine management module controls the ignition, no other amplifiers are used .
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Justin B.

  • Administrator
  • Mt. Olympus Resident
  • *****
  • Posts: 5910
  • I love my Beemers
Re: Oilhead ignition coil
« Reply #4 on: June 14, 2022, 09:35:49 PM »
Glad you got it figured out.
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!