Author Topic: YZ 250 D Charge coils - fitting  (Read 1345 times)

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Offline Devondan

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YZ 250 D Charge coils - fitting
« on: May 22, 2014, 07:32:29 AM »
Having found a pair of NOS ones, I'm fiiting a new pair of charge coils to my 250D, I have to solder the wires to the connectors which is easy enough, but then the connection box has to be filled with something - epoxy I assume? - any suggestions what I should buy?

Dan
IT  400D - Trail riding
74 Montesa Cappra - Racing
YZ250 H - Racing
Norton ES2 500 trials
Norton 250 Jubilee - Road
Norton 350 Navigator (in boxes)
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Offline 2fITy.J

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Re: YZ 250 D Charge coils - fitting
« Reply #1 on: May 22, 2014, 04:12:12 PM »
I had to rebuild the Pulsar coil on my old DR650 and I used 24hr Araldite*....that was 4-5 years ago and 25k done with no issues. Pulsar coil (and generater etc.) is situated within the engine oil too.

* Two part epoxy adhesive.


Cheers,
Chris.
A bike in the bush is worth two in the shed!

BMW-BSA-Ducati-Honda-Kawasaki-Lambretta-Matchless-Norton-Suzuki-Triumph-Vespa-Yamaha.

Dirty Dozen '13 DR650SE - '90 DR650RS - '82 IT465J - '82 IT250J - '80 GT80G - '77 A100B - '76 DT100C - '76 TC125 - '75 TM75 - '73 MX80 -       '73 TC100K - '69 TC120-1

Offline Tanis

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Re: YZ 250 D Charge coils - fitting
« Reply #2 on: May 22, 2014, 08:07:55 PM »
Pick an epoxy that is non-conductive and heat resistant I use Devcon products because there the bomb. They can be expensive but iv found that you can order it through RS components ("free" same days shipping) 
You threw it out i picked it up and fixed it.

Offline wayne61

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Re: YZ 250 D Charge coils - fitting
« Reply #3 on: May 23, 2014, 06:06:00 AM »
I was gonna say araldite but wasn't brave enough...
Cheers Chris ;D
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Offline fred99999au

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Re: YZ 250 D Charge coils - fitting
« Reply #4 on: May 23, 2014, 07:17:39 AM »
Solder the wires to the connectors? I would be using crimp lugs as per the original design.

I used to think soldering was the best method of joining, but in some circumstances, a crimp is less failure prone when subjected to vibration.

Offline 2fITy.J

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Re: YZ 250 D Charge coils - fitting
« Reply #5 on: May 23, 2014, 03:33:57 PM »
I'm not so sure fred....but I'm no expert.

I owned a gaggle of British twins in the 70's and one of the big gripes was the solderless joins that invariable rattled or pulled loose. Solder fixed 'em all.

Perhaps those crimp type connectors are better made these days!





Cheers,
Chris.
A bike in the bush is worth two in the shed!

BMW-BSA-Ducati-Honda-Kawasaki-Lambretta-Matchless-Norton-Suzuki-Triumph-Vespa-Yamaha.

Dirty Dozen '13 DR650SE - '90 DR650RS - '82 IT465J - '82 IT250J - '80 GT80G - '77 A100B - '76 DT100C - '76 TC125 - '75 TM75 - '73 MX80 -       '73 TC100K - '69 TC120-1

Offline fred99999au

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Re: YZ 250 D Charge coils - fitting
« Reply #6 on: May 23, 2014, 04:48:54 PM »
Got that from the soldering teacher who was a RAAF engineer.

Offline Tanis

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Re: YZ 250 D Charge coils - fitting
« Reply #7 on: May 23, 2014, 11:22:27 PM »
Got that from the soldering teacher who was a RAAF engineer.

If he was talking about aviation electronics the crimps are not comparable to any thing a hobbyist would own or use the crimpers are in the hundreds to more than that to buy! Crimps ain't crimps. If your worried join it and use heat shrink over the joins to support them chances of it failing after that are bugger all. Heat shrink will solve vibration and moisture penetration problems. 
You threw it out i picked it up and fixed it.

Offline 2fITy.J

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Re: YZ 250 D Charge coils - fitting
« Reply #8 on: May 24, 2014, 07:24:53 AM »
Yeah I solder and heatshrink breaks/joins now....never had a failure, but obviously you must insure your spot on with what your doing.....undoing is a pita! Jaycar have a series of bullet connectors at very reasonable prices




Cheers,
Chris.
A bike in the bush is worth two in the shed!

BMW-BSA-Ducati-Honda-Kawasaki-Lambretta-Matchless-Norton-Suzuki-Triumph-Vespa-Yamaha.

Dirty Dozen '13 DR650SE - '90 DR650RS - '82 IT465J - '82 IT250J - '80 GT80G - '77 A100B - '76 DT100C - '76 TC125 - '75 TM75 - '73 MX80 -       '73 TC100K - '69 TC120-1