cdi units interchangable 84-88 ?


Information and questions on GL1200 Goldwings (1984-1987)
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victorvmg
Posts: 29
Joined: Mon Dec 11, 2017 8:48 pm
Location: port saint lucie/fl
Motorcycle: honda 1984 gl1200 interstate

cdi units interchangable 84-88 ?

Post by victorvmg » Tue Mar 17, 2020 3:13 pm



will they interchange in different years a models?



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Charlie1Horse
Posts: 509
Joined: Mon Sep 16, 2013 9:35 pm
Location: Jacksonville, Florida
Motorcycle: 1986 GL1200A Aspencade
1992 GL1500I Interstate

Re: cdi units interchangable 84-88 ?

Post by Charlie1Horse » Thu Mar 19, 2020 4:41 pm

Go to partzilla.com and find your make and model. Check for the part you are seeking and make note of the part number. Then find the make and model of the donor bike and check that that bike has the same part number for the same part.
Russell

Those who say it cannot be done should try not to interrupt those who are doing it.

victorvmg
Posts: 29
Joined: Mon Dec 11, 2017 8:48 pm
Location: port saint lucie/fl
Motorcycle: honda 1984 gl1200 interstate

Re: cdi units interchangable 84-88 ?

Post by victorvmg » Thu Mar 19, 2020 9:32 pm

found it on cheap parts,now all I have to do is find one.thanks for the info.

jljim
Posts: 9
Joined: Sun Jun 16, 2019 11:43 am
Location: Delta, Ohio
Motorcycle: 1987 GL1200 Interstate
1986 GL1200 Aspencade
1985 ZN1100
1982 GS1100L
1981 KZ650CSR

Re: cdi units interchangable 84-88 ?

Post by jljim » Mon Mar 23, 2020 4:13 pm

I would not expect the 1988 units, being 6 cyl engines, to work on the 1200 4 cyl engines. Partzilla shows 2 different part numbers for my 1987 Interstate, both of which are listed to fit '85, '86 and '87 models. That being said, neither my '86 or '87 have those part numbers on the label. The first picture is from the '86 Aspencade, the other 2 are spare parts from salvage yards taken from a "running" 86 and 87 bike. The wire colors and harness connectors are identical. I haven't pulled the shelter off the '87 yet to check its number. If time and weather permit, I'm going to swap parts between bikes and see what happens.







victorvmg
Posts: 29
Joined: Mon Dec 11, 2017 8:48 pm
Location: port saint lucie/fl
Motorcycle: honda 1984 gl1200 interstate

Re: cdi units interchangable 84-88 ?

Post by victorvmg » Mon Mar 23, 2020 6:34 pm

thanks,there must be different model numbers on same bikes. cheap cycle parts has the number as 30400-mg9-742

jljim
Posts: 9
Joined: Sun Jun 16, 2019 11:43 am
Location: Delta, Ohio
Motorcycle: 1987 GL1200 Interstate
1986 GL1200 Aspencade
1985 ZN1100
1982 GS1100L
1981 KZ650CSR

Re: cdi units interchangable 84-88 ?

Post by jljim » Mon Mar 23, 2020 7:37 pm

Partzilla shows the same part numbers as cheap parts although the later has scratched the 741 in favor of the 742. Has anyone ever seen either one of these on a bike or were they being sold as a generic part to replace the OE part numbers like I have on mine ?

Shadowjack
Posts: 53
Joined: Wed Aug 17, 2011 5:22 pm
Location: Bellevue, NE
Motorcycle: 1977 GL1000
1975 CB750
2011 NT700VA

Re: cdi units interchangable 84-88 ?

Post by Shadowjack » Tue Mar 24, 2020 7:15 am

When I get time I'll verify this, but the '84 pulser units were supposed to have a different resistance value from the '85-'87 units. '84 was around 1200 ohms and '85-'87 was around 330, both plus or minus 10%.
The ignition module part numbers and sticker color changed between '84 and '85. The green one is for an '84 and the blue one is '85-'87. I do not know if mixing the two would have an effect on the way it runs, or if it would change the life expectancy of any unit.

jljim
Posts: 9
Joined: Sun Jun 16, 2019 11:43 am
Location: Delta, Ohio
Motorcycle: 1987 GL1200 Interstate
1986 GL1200 Aspencade
1985 ZN1100
1982 GS1100L
1981 KZ650CSR

Re: cdi units interchangable 84-88 ?

Post by jljim » Tue Mar 24, 2020 8:53 am

My thought is the early 1200's that used the rear mounted pickup coils will probably use a different module. The green label in the first picture is on my '86 Aspencade and is likely original. My '87 Interstate also has a green label ? I have checked back 2 owners before me and no one has replaced the module. I ride the '87 , the '86 is a project bike.

Shadowjack
Posts: 53
Joined: Wed Aug 17, 2011 5:22 pm
Location: Bellevue, NE
Motorcycle: 1977 GL1000
1975 CB750
2011 NT700VA

Re: cdi units interchangable 84-88 ?

Post by Shadowjack » Tue Mar 24, 2020 9:31 am

And there we have it: a solid non-consensus. :D
Sturgeon's First Law: Nothing is ever absolutely so.

jljim
Posts: 9
Joined: Sun Jun 16, 2019 11:43 am
Location: Delta, Ohio
Motorcycle: 1987 GL1200 Interstate
1986 GL1200 Aspencade
1985 ZN1100
1982 GS1100L
1981 KZ650CSR

Re: cdi units interchangable 84-88 ?

Post by jljim » Tue Mar 24, 2020 11:15 am

Meant to include this the last post.....my green labels are made by Hitachi, the blue labels are Nippondenso. I would invite anyone that has time to just check the label color in their bikes and list the year/model ? Color is pretty easy to see, part numbers are not so easy without lifting the shelter.

Shadowjack
Posts: 53
Joined: Wed Aug 17, 2011 5:22 pm
Location: Bellevue, NE
Motorcycle: 1977 GL1000
1975 CB750
2011 NT700VA

Re: cdi units interchangable 84-88 ?

Post by Shadowjack » Tue Mar 24, 2020 11:43 am

I just measured the pulser resistance on a spare '84 engine: dirty, nasty, and well-used. Came out to 1100 ohms or so. Also measured the pulser resistance on the brand-new set on the '85 project engine: never used, fresh from the dealer. 300-odd ohms.
Whether this means you can't mix modules and pulsers, I cannot say. Nothing is running here at this stage.



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