CB 750 coils

I had a set of CB 750 coils from an old project. I noticed one of my coils had cracks in housing. The cb coils have removable caps for plug wires, and since they are Hitachi flip them around and they mount just like stock. I'm so impressed runs so much smoother , and my tach responds better . Best thing since I had these laying around , used a set of VW Bosch plug wires so this was "CHEAP"LOL

 

did you ohm out the coils?
how do the CB 750 match up for stock set up ohm wise?

 

Update went for a 65 mile ride...i got TOTALLY lost lol ...bike ran great i hit 80 a couple of times....To answer the question yes I ohmed out coils they are the same as the stock Seca coils . The Honda CB 750 coils are Hitachi same as stock , if these had not ohmed the same I would not have tried it so far so good.

 

Here is a picture of the coil install .

 

Do you know the year for those CB coils? Obviously off a CDI bike, so late 70s-early 80s?

 

That's a great upgrade option with replaceable wires and stock mounting.

 

Yes these are off an 82 CB750 Custom , I replaced the originals chasing a cold cylinder got both for 25.00 $ it was not the coils I had a bad plug resistor. So I've had these for like 6 years almost pitched them, so glad I did not !!! So far bike seems to run stronger I had to adjust idle down a little after install. I like being able to change plug wires too , I desoldered the plug off old coils crimped on push on connectors so these "plug" in to harness as stock . My picture only shows the right coil ,but looked at my old coils both have numerous cracks bike ran ok though. I've seen some "new" coils on eBay for a cheap price, but I'm Leary of these (CHINA) . Yes if I had crazy money I could go to Dyna Coils , but if you can find a good used set try the CB 750 coils . I was shocked how well they mounted all I had to do was flip them around, and no interference with the tank either.

 

Hey Jetfixer, just wondering if you would suggest this as well as wondering if those coils would work with my 81 XJ with TCI Igniter.

I just got my bike and I'm having a lot of issues getting XJ coils for a decent price but I can get CB750 coils locally.

 

Looks like a nice fit and not a budget killer. Bet there is plenty of used ones around that can be had for cheap!

 

These are plug and play with the TCI , I have an 82 XJ750 Seca . These coils are Hitachi so they are the same manufacture as stock coils. I would recommend if you do this swap, de-solder the plug off old coils use some good quality crimp on connectors and use this to plug in to the bike wire harness. The wires on mine are orange positive (+) and gray negative (-) if in doubt hold old coil above CB coil there SHOULD be a small (+) and (-) mark on the coil (might not be marked ) . Looking on ebay there are many more CB coils for sale cheap.

 

Hi guys, just wondering if his mods will work with my 81 XJ 650 Special? i have a Honda CB750 coil available here, if its a good upgrade i would surely try its..

 

Yes it should work if you see my picture you will see how you mount it , flip coil pack over and it should bolt in just like stock.

 

A coil? You'll need two, unless you mean that you have an XS650.

 

Tnx. k-moe, yes i mean 1 have a pair 2pc this will be my project this coming saturday...

 

Would this be the CB750 coil you were using?

 

Yes they work great and fit in like stock ,you only have to flip them over , I desoldered the wires off stock coils and crimped on push on connectors.

 

Appreciate it, I have ordered a set and 25foot of 7mm wire.

 

How far away from the engine are you mounting the coils?

 

This is a great mod/upgrade!

I’ve also made it a “sticky”

dfox