coils

[black 82xj1100]

Hi all
Finally got my dream bike 1982 xj1100j
Been having trouble with it shutting down after it gets warm.
I searched the threads and I checked the pickup coil wires and the solder thing with the tci and after that i have not had a problem after a week of riding ,that is until last night It left me stranded for 2 hours until it cooled off then cranked right up and made it 10 miles home
I pulled the tank tonight and looked at the coils. It seems that someone has replaced them before and Im not sure if i am right or not but there should not be any round quick connects between the coils and harness connector should they? where the quick connectors are the wires have been getting real hot as in melt the insulation hot. Could someone tell me where to find a part number on these things and what part numbers it should have.
Thanks,
Mike

[bikerphil]

Left coil: 4H7-82310-60-00 (cyl 1+4)
Right coil: 4H7-82320-60-00 (cyl 2+3)

The coils should have modular plugs on them. Clean and di-electric grease all your connections. i don't think the coils have a part# on them, but I could be wrong.

[black 82xj1100]

By modular plugs are you talking about the round push in plugs along with the square wiring harness plug ? seems kinda stupid to have two connectors for the same wires so close together on such a short set of wires doesn't it?

[bikerphil]

Should have a block type plug on the coils and one on the harness for each coil. If there are more than that, someone probably spliced them. Make sure all connections are clean and solid.

[black 82xj1100]

Thanks ! Thats why i think someone has changed them before and the small round push in connectors are making a high resistance point with the wire insulating getting hot enough to start melting on each side of them. What would you recommend that i do at this point? replace with stock coils or some kinda aftermarket ones ? and which one would be the most dependable for a daily driver?

[bikerphil]

Most people here replace their coils with the following from MikesXS. They are high output and the price is reasonable. You'll need the following...

Coils: P/N 17-6803 2 ea.
Wires: P/N 23-2902 2 set

http://www.mikesxs.net/products-27.html#products

[DGXSER]

FYI, from what I've read, don't let MikesXs know you want parts for an XS11. A recent discusion confirmed that they won't even return emails if they know you want parts for an 11.

[TopCatGr58]

Hey Black,

Would be interesting to find out what brand/model #'s are on the coils you have now!? Some folks don't know/realize that these ignition units/TCI's are NOT CDI's, and if they put a 0.7 ohm coil in there, then they can fry the TCI!!! The XJ does not have a ballast resistor in the power circuit for the coils, so the MikesXS are plug and play. A bad coil can work okay when cold, but if they get heated they can have a break/short in the wiring and stop working. I would try to measure the Primary winding's resistance...ohmmeter on + and - terminals, should be about 2.5 to 3 ohms, but if you get less than 1, then I would NOT run the bike until you replaced them!!! Also, Ohm your plug caps after you remove them from the wires, should be about 5-7kohms, inspect for corrosion where they fit the wires, you could reuse them, or get new ones while you're also ordering the coils and wires!
T.C.

[black 82xj1100]

There are no markings on them. Look like stock besides for the splicing of the wires. Setting on bike the left one ohms out at 6 the right one at 5.9 ohms.
The plug caps all check out ok along with the wires.
Mike

[black 82xj1100]

Most people here replace their coils with the following from MikesXS. They are high output and the price is reasonable. You'll need the following...

Coils: P/N 17-6803 2 ea.
Wires: P/N 23-2902 2 set

http://www.mikesxs.net/products-27.html#products

thanks phil ordered them today
Mike

[bikerphil]

Primary resistance (thin wires) should be 3 ohms between the two.
Secondary resistance (thick spark plug wires) should be 15K ohms between the two. All values +or- 10% at 68F according to service data. If the coil(s) quit when they are hot, they are probably bad. You are better off with those new replacements than 25+ yr. old coils.

[black 82xj1100]

Thanks Phil,
That was the primary resistance that i measured so I did not go any further in measuring the secondary.
Cant wait till Tuesday so I can get her back on the road
mike

[trbig]

A recent discusion confirmed that they won't even return emails if they know you want parts for an 11

If you are in a business to sell parts.. and those parts somehow cross over to another bike... is there anyone here who would turn down more money to sell more parts?? I just don't get these guys. If it's simply the fact that they don't want to warranty it unless it's put on a 650... then state that in writing and still make more money. It all just baffles me.


Tod

[Jerry]

It all just baffles me.

I agrtee...seems to me that expanding your business is not a bad thing. Given the activity on this list, and the number of members constantly looking for parts that are known to work well, seems to me that Mikes's should welcome the business, particularly in the economic downturn we are now in.

I understand that he built his business in the 650 line and likes the camaraderie of that group of owners, but we are not asking him to gurantee anything, or advice, just asking for the parts.

[DGXSER]

Like I say, the only thing that makes any sense to me is that he feels he has a limited number of parts that he does not want to go to anything but the 650's. Kinda like seeing the sacred rear wheel bearing for an 1100 being sold as a substitute bearing for something else, then you need one and they are gone.

Not that I agree with that attitude, or that Mike has that frame of mind. Just trying to make sense of the madness is all. Amazing how the human mind can rationalize just about anything huh?