Cx500 Universal CDI coils(Cheap)

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Cx500 Universal CDI coils(Cheap)

Postby Gman » Mon Aug 17, 2009 6:37 pm


Warning!If the Air-dam heat deflector mounted on top of the engine cylinders is missing or damaged the excess heat can affect the coils causing all sorts of problems like limited Revs,Misfiring,rough idling.


A couple of weeks ago I had a coil failure on my CX500.It showed itself as limiting/bogging down my speed to 60 mph almost as if the High speed Stator windings had gone and sometimes only on one cylinder especially in the rain.After checking all the Stator and CDI readings I eventually tested the coils and plug caps.The right hand side coil had gone,"High Resistance" as had the Plug cap.This also manifested itself 1st when riding in the rain or damp as one side of the engine not firing.

The good coil tested 7.5k approx between the LT wire and the HT wire.The decent plug cap had continuity as it should as my plug caps don't have Resistors in them.

Note:Even if the coils have these readings that's no guarantee that the coils are 100% as they can break down if faulty when they get warm.

http://globalcxglvtwins.hostingdelivered.com/viewtopic.php?f=8&t=84

I only had one good-ish coil and plug cap left in my old spares box.They kept me going.I started looking where I knew for some new coils.Wemoto http://shop.wemoto.com/index.dyn?oid=1911758,who are very good,have them but for a pair they come to over £50 UK pounds.Having researched CDI Ignition over the years I discovered that the coils used on older Vehicles with,"Points" ignition are the same.They did however have the plug caps at a decent price so I bought a pair.

I took a gamble on a Universal CDI coil off UK Ebay,

http://cgi.ebay.co.uk/UNIVERSAL-IGNITIO ... 41586b1a65

But these International ones will work,

http://www.ebay.com/itm/Ignition-Coil-Y ... 1e&vxp=mtr

I had to cut the HT cable a little and make a bracket which I made sure was bare metal at both ends to ground the Coil correctly at the mounting holes and also fit a spade connector to the old Pink right hand side wire I ripped off the kaput coil.The coil has now been running for over 200 miles and no problems thus far.
It's Resistance reading is 5.5k ohms between the LT and HT wire.It's a lot smaller than the originals about half the size,

Image


It has now been on the bike nearly a year with no problems.

You can get them of Ebay,
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Re: Cx500 Universal CDI coils(Cheap)

Postby Randall-in-Mpls » Mon Aug 17, 2009 6:59 pm

Thanks, Shep. I've just begun the same search, as I'm convinced my 5k stumble is the result of a failing coil. Do you have any more specs on this universal unit? It would help me to source one here.

R
1978 CX500 - Black Grub
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Re: Cx500 Universal CDI coils(Cheap)

Postby Randall-in-Mpls » Mon Aug 17, 2009 7:54 pm

Thanks, Shep. I was looking at this one, but I'm not sure if the spec is right.

Maybe I'll have to try your second link.

R
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Re: Cx500 Universal CDI coils(Cheap)

Postby Gman » Mon Aug 17, 2009 8:15 pm

Ignore the 1st link.The 2nd one is the way to go.
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Re: Cx500 Universal CDI coils(Cheap)

Postby Gman » Mon Aug 17, 2009 10:47 pm

Randall-in-Mpls wrote:Thanks, Shep. I was looking at this one, but I'm not sure if the spec is right.

Maybe I'll have to try your second link.

R


The other ones we have found are better.
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Re: Cx500 Universal CDI coils(Cheap)

Postby Randall-in-Mpls » Mon Aug 17, 2009 11:56 pm

Sheppola wrote:Ignore the 1st link.The 2nd one is the way to go.


One feature of the first one that I like is the removable HT cable. I haven't seen that on any of the eBay specials I've looked at.

R
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Re: Cx500 Universal CDI coils(Cheap)

Postby Gman » Tue Aug 18, 2009 10:55 am

Randall-in-Mpls wrote:
Sheppola wrote:Ignore the 1st link.The 2nd one is the way to go.


One feature of the first one that I like is the removable HT cable. I haven't seen that on any of the eBay specials I've looked at.

R


Yes that's a nice feature.However at this price and if they work out ok(Should do) the other ones are so cheap we can keep or get spares any time and considering the old ones have given most likely over 25 years service who knows how long the substitutes will work.Consider that manufacturing techniques and materials have improved as well in that time as well :)
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Re: Cx500 Universal CDI coils(Cheap)

Postby Rayman » Thu Aug 20, 2009 7:30 am

Highest authority !!! :o

you've obviously NEVER spoken to my wife or kids !!

I'm here too - just a lot quieter ........

Should be able to post re some progress both here and .au com the weekend i hope !!

Rayman
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Re: Cx500 Universal CDI coils(Cheap)

Postby Gman » Thu Aug 20, 2009 10:52 am

Rayman wrote:Highest authority !!! :o

you've obviously NEVER spoken to my wife or kids !!

I'm here too - just a lot quieter ........

Should be able to post re some progress both here and .au com the weekend i hope !!

Rayman


Keep us posted :)
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Re: Cx500 Universal CDI coils(Cheap)

Postby vdotmatrix » Wed Oct 21, 2009 12:47 am

Hi all
I am trouble shooting an intermittent stumbling problem with my 1980 CX500 custom.
at 30 years old, I can afford to replace anything or everything electrical.

So, I can't follow what you guys are referring to about using the first link or the second link .

Can you please just tell me which product will be the best for my application, with ease of installation etc.

Whatever will involve the least bit of gerry riggin!

Are the Honda parts still available for this application?

SHEPP that music isn't backyard garage stuff, it is awesome...I like it!
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