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I have a 1975 GL1000 with a recently swapped 78 GL1000 engine. With some help I have diagnosed that the left side of the coil is bad. I have bought a replacement from Ebay but am getting impatient waiting for it. I also have a 1979 CB750K (first year of DOHC I think) which I can 'borrow' parts from if needed. Would this ignition coil be compatible and have same wiring setup? Please note that I am not a bike expert and a quick search on the web didn't turn up anything. Basically it's a nice clear (which is rare here at this time of year), albeit cool day and I would really like to hear my baby run (it would be first time since May of 2008).
 

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I guess they aren't the same, different part numbers and price on BikeBandit :( Time to hurry up and wait for the mail.
 

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I once had a 76 CB750A at the same time I had my first GW which was a 75 1000. In my need to learn as much as I could about both bikes I learned they shared a lot of the same electrical parts, including the same battery.

So, even though BikeBandit may list the coils with a different part number, the part number on the coils may be the same, worth a look.

One thing I'd make sure of first, is the new engine still using points or has it been switched to the Dyna electronic setup? Makes a difference in the coils you need.
 

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You can use coils from a gl1100. Theyare usually easier to find than 1000 coils and one more advantage of using the 1100 coils is that you can replace the ignition wires. ( 1000 wires are attached to the coils) I just completed a job last week where I replaced the coils on a 75 1000 with coils from an 81 gl1100. Worked great. You have to fabricate some small brackets but it is a simple job. I see that you live in the Valley ( I live in Bedford) There is a used parts shop not far from you called "Loomers Machine and Cycle" . Their address is 1445 Marshall Rd. in Kingston NS.I bet you can geta set of gl1100 coils there..........GM
 

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I put electrical tape on mine as suggested here, and rode for quite a while with cracked coil. She still ohmed out ok, but was bad when real hot.. with tape helped a lot. Maybe you could ride a little this way..
 

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You can also fill the cracks with epoxy.
 

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3M makes a liquid coating that is good for an outstanding amount of volts per coat, I used it on some old boat motor coils and even in that type of conditions I never had an arc.
 

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Any coil will work. Some have 5000 volts, some 20K volts. Doesn't matter.
 
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