Soooo I need a new one of these!!

Griff · Post by **Griff** » Tue Apr 27, 2010 5:39 pm

Fouling plugs, bad spark, yada yada yada...

Pulled the coil out and found that "waxy substance" you guys talk about all over the place.

Where do I buy a new one with the plug wires/caps wired in? Any suggestions?

Will any of the Ebay coils work well?

http://motors.shop.ebay.com/i.html?_nkw ... t=0&bkBtn=

Spokes · Post by **Spokes** » Tue Apr 27, 2010 7:01 pm

I got a few from ebay for the CA95. Some were junk. If you can find a clean one take an OHM reading. If it reads above 2.0 I call it good.

Don't know about the asian sources. You can replace the wires and caps. That's what I do. I have one finished with new wires and caps with a good OHM reading and clean connectors. It is for my CA95 Build which won't be ready for a while. With the original price, parts and shipping I got $45.00 in it.

Check around for a while, If push comes to shove we can work something out.

aaron7 · Post by **aaron7** » Wed Apr 28, 2010 4:59 am

I didn't know you could replace the wires. The shop I took mine to for testing said they were permanent... and I threw some away

Wish it wasn't a weird single coil dual wire thing, otherwise you could just use pretty much any coil for a 6v setup.

Spokes · Post by **Spokes** » Wed Apr 28, 2010 7:08 am

Most folks think that you can't replace the wires. All you need to do is chip away the plastic resin like sealer around the spark plug wire at the base on the coil. Once the sealer is chipped away, just give a good pull and the wire comes out. Look inside and you will see the contact spike.

Replace with 7mm spark plug wire, I get mine from ebay or use wire made for snowmobiles. They are heat and chemical resistant and way better than the originals. Cut them to size and press the wire in to re-seat the contact spike. Then reseal with automotive sealant or as I do, mix fiberglass resin with a little polyester body filler (tiny amount) add a few drops of hardner and apply the mixture with a toothpick around the wire.

The caps can be found at http://www.hondaminitrail.com just click on the CT70 "oval" and search. They are nice NKG caps with rubber seals.

New wires and caps look very sweet on the bike.

Brewster · Post by **Brewster** » Wed Apr 28, 2010 11:09 am

Spokes I learned the same repair from XS650.com but I have used black silicone. This saves the mixing and when set up in 24 hours holds excellent plus its waterproof.

Griff · Post by **Griff** » Fri Apr 30, 2010 12:01 pm

What's the correct model number for the OEM coil that was in these?

Mine was a Denso 29700-071-1

Will any 6v 2 wire coil work? Thinking of grabbing one of the ones on eBay, too bad, I wanted to ride it this weekend. Any other good sources?

I'm hoping this was the reason for my fairly poor combustion from wet fouling plugs after riding for a few blocks.

Spokes · Post by **Spokes** » Fri Apr 30, 2010 5:45 pm

My CA95 coil is a Denso 29700-026-0. I am going to stick my neck out and say that yours may be just an equal replacement coil. Can't say for sure if a hotter spark will solve your fouling problem. I would look at what the exaust looks like. Black=too much fuel Blue=Oil. Sometimes it is the wrong plug. It will be interesting to hear what others in the forum think.

Griff · Post by **Griff** » Sat May 01, 2010 2:51 pm

The inside of the exhaust was VERY black when I bought it, I rebuilt the carb., bored the cylinders, tossed in all new pistons/rings, lapped the valves, sealed the head etc...

After all that I still never had really good spark/clean combustion after riding for just a mile or so (after running really great for that mile with new plugs). I'd limp it home, pull the the plugs to find them wet and very black, I'd clean them up or toss in new ones and it ran A+ for a mile or so again.

The found that the coil was TOASTED and plug caps corroded, so I'll swap that and go from there. I really can't believe it even ran with them in that condition.

Spokes · Post by **Spokes** » Sat May 01, 2010 3:33 pm

If you have a hard time finding a coil, I can lend you my rebuilt one. When you find a replacement, just send it back. You can pm me if interested. I won't need it for several months anyway.

Griff · Post by **Griff** » Sun May 02, 2010 5:22 pm

Spokes: Thanks, I've got my local vintage Japanese bike shop here in San Diego digging through their vault of parts to see if they have one, if not I'll try my luck on eBay this week then go from there.

Always fun! Next tubes and tires...