Topic: CB750: New Plug Wires

[Loudpipe]

How do you get the old ones off?  I thought they just pulled off of the coils (I assume those are coils, right under the fuel tank), but it seems they have some hard plastic or rubber sleeve running into, or becoming a part of the coil casings.  Do you have to buy them together, or do I need to take them off and disassemble them to put the new ones on?

[markjenn]

The wires are not designed to be replaceable.  If the problem is poor contact at the spark plug cap, you can clip off a small amount of the wire and rethread the cap on.

I've seen some shade tree tutorials for dremeling into the coils and fitting new wires, but this looks like tricky major surgery to me.

Most of us just install new Dyna coils with replaceable wires and be done with it.

- Mark

[ieism]

I think I have a walk trough from an old magazine that shows how to fit new wires to cb coils. Send me an email to info@ivareisma.nl and i'll mail you the article.

[Loudpipe]

Where do you source Dyna coils from?

[Steelo]

Try Z1
http://www.z1enterprises.com/
They do good deals on Dyna coils

[Loudpipe]

Where can I find out what resistance my ignition system is?  Looks like they sell 1.5, 2.2, 3.0, and 5.0 Ohm coils.

[dramsell]

I replaced only my wires by purchasing NGK waterproof spark plug couplers and cutting the wires coming from the coil 4" from the coil and fitting new wires I purchased from the local auto parts store.

Works great!  I believe the NGK part number is J11.

Good luck

Dave

[markjenn]

Works great!  I believe the NGK part number is J11.

Good find.  I wondered if anybody had something like this.  Assuming you have good wiring coming out of the coil, this looks like a great/inexpensive  solution.

I think they're called J-1.

http://www.bikebandit.com/product/1856?WT.mc_id=666111

- Mark

[dramsell]

Yes. 

But go to: http://www.ngk.com/results_cross.asp?pid=j-1

The price is only 4.56 each.

Good luck!

Dave

[markjenn]

Further note:  Don't be surprised if you have a surprisingly hard time finding bulk 7mm plug wire.  I had to go to five or six auto parts stores locally to find it and I would never have thought to go to the store I ended up at without a tip from a guy in a motorcycle shop who used to work there - the store had a few feet left on a roll in the back of the shop and said they weren't ordering it anymore.  A few places stock in online, but the shipping costs eat you up for a small quantity.  Bulk wire and screw on spark plug caps are now three or four generations removed from current ignition technology.

- Mark

[Triffecpa]

if you look on Ebay, you can find early 80's Honda OEM coils that are set up for replaceble plug wires.  Then you can buy a set of Dyna plug wires from Z1 Enterprises for about $16. 7mm, solid copper wires. The wires include new caps also.  You can do the whole thing for about $40-50 or so.  Lots cheaper than the Dyna coil alternative.

TR

[uwjberg]

are there any 80's coils specifically that will work? i'd like to try that method.

[Scrubs]

I heard somewhere that the GL1000 ones do. try a search for that here, I'm sure it will bring up something

[Triffecpa]

any of the 4 cylinder bikes in Honda's line up in the early to mid 80's will work. 

You will see from a picture of them that there is a screw on cap that holds the wire to the coil.  Unscrew the cap, pull the wire out of the coil, insert a new wire thru the cap and screw it back onto the coil again. 

So, CB650, CB750, CB900, CB1100, GL's probably.  In fact I think that Honda used those same coils up thru the CBR600F2 models.

[uwjberg]

ok - i've read on a search that some GL coils will need a resistor added - true? if so, how can you tell if one is needed on used coils?

[Triffecpa]

I run these coils on several vintage race bikes with a Dyna S ignitions and have never bothered with a resistor.  maybe ignorance is bliss...

TR

[Scrubs]

ok - i've read on a search that some GL coils will need a resistor added - true? if so, how can you tell if one is needed on used coils?

As far as I understand.. (somebody correct if I am giving duff information here)
It's only the 3 ohm coils which are reccomended to have resistors installed?
although there are many people such asTriffecpa running without resistors
with no problems. you can measure the coils with a ohm meter to check there rating.

[joecool14u2]

i bought new coils from jcwhittney, dual outlet per coil, run two of them, cost was like sixty dollars or so, still have points, these coils have run 9000 miles so they seem fine, i don't know the ohms but i take it there for older bikes and there chrome so they look good and work on older bikes without the problems, can any one post a difference in running the electronic pick-up instead of points? other than having to adjust the points?

[HondaMan]

How do you get the old ones off?  I thought they just pulled off of the coils (I assume those are coils, right under the fuel tank), but it seems they have some hard plastic or rubber sleeve running into, or becoming a part of the coil casings.  Do you have to buy them together, or do I need to take them off and disassemble them to put the new ones on?

LP: they are attached directly to the coils, not changeable. If you pull one out, it break off the wire that attaches to the coil.

The wires are not replaceable, just the coil-with-wires as a set.

[mrbreeze]

Back in the 80's when I had my 77 Kawi 1000 LTD,I went to cycle salvage and bought the coils off of a newer model Kawi real cheap. These newer coils had replacable wires so I just went to Kragen's and bought bulk Accel wire kit and all was good. My current Honda got a Dyna 2000 ignition along with an Accel coil & wire set from Dennis Kirk about 2001-2002. The dyna was around $375 and Accel coil set was $150. Don't know what they go for these days but I recommend this setup in a heartbeat as it has been totally bullitproof.