No spark after re-gapping points - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 10 (permalink) Old 05-27-2008, 04:12 PM Thread Starter
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No spark after re-gapping points

72' T100R
I started my bike about a week ago for the first time since last season and it ran great in the garage. When I took the bike out and gave it a little throttle it sounded like one of the cylinders was lagging behind and I would loose all power until I let loose of the throttle.
So this morning I decided to take a look at the points to make sure they were gapped right, and the right one was quite a bit smaller than .015 in, so I adjusted it. I put the plugs back in an tried to kick it over but it would not fire.
I took a voltometer to the points to make sure they were making good connections, and they were. My battery is fully charged and all of the lights work fine.
As of yesterday my bike was running great, so I dont think its anything with the coils.. im guessing there is a very simple fix but I cant figure it out.
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post #2 of 10 (permalink) Old 05-27-2008, 04:36 PM
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wont start

did you turn on the gas?


acutally, if you pop the points open with the ignition on, there should be a nice fat blue spark each time they open. if not, could be condenser or coil problem.
cliff

2006 Bonnie Black
1980 Yamaha xs650 sold 4-30-2011
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post #3 of 10 (permalink) Old 05-27-2008, 05:16 PM
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ya might want to recheck your timing when you changed the point gap you also changed the timing depends on how much your bike can change and still start i,ve seen some so retarded on timing the pipes turned blue and they still started hth
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post #4 of 10 (permalink) Old 05-27-2008, 05:19 PM Thread Starter
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I just turned on the key and seperated the points with a plastic tool and nothing happened. how should i check the condensers and coils?
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post #5 of 10 (permalink) Old 05-27-2008, 06:22 PM Thread Starter
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I dont know what is going on at all.
I have been trying to test the coils how my Haynes manual told me, which is to unplug the main cable going into the coil and setting it 3/16" away from the head, turn the engine so the points to the coil i unpluged are touching, turn on the key, and then flick the points apart to see if there is an arch.
I tried that on both coils and nothing worked.
The only thing I touched was the points plate. I have a hard time believing it is the coils when they were working fine yesterday.
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post #6 of 10 (permalink) Old 05-28-2008, 03:18 AM
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It's not your coils. I think you'll find you've moved a wire or a metal component in the points area, and shorted one set of points to earth. Have a close look with a good flashlight/torch, and look for wires, connectors touching metal parts, studs, nuts, etc. The only things that should connected to the wires are the springs on the moving part of the points. Wires should not physically contact posts,nuts, etc.

The other possibility is a broken wire. Check continuity between points wire and coil +VE terminals.

Per Ardua Ad Astra
(Through difficulties to the stars)
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post #7 of 10 (permalink) Old 05-29-2008, 05:48 PM
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hey mr zimp i,ve something simaler happen to me when i install the little plastic bushimg that is on the point i installed it wrong it looks like a small top hat check your manual make sure it on right hth
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post #8 of 10 (permalink) Old 10-14-2019, 11:22 PM
Minitwins
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I have one for you just rewired my T100R all new electronics , coils, condensers , Battery , and of course plugs, motor is fresh rebuild , so was put TDC ( using the proper tool) and set the cap on the points were they are suppose to be,have power going to the Neg, side of coil but nothing at the points , I am most likely screwing the pooch on something minor or major , this is my first Brit ride , and know Harley's but I am finding things are a lot different with British rides any help will be appreciated , thanks in advance !!!
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post #9 of 10 (permalink) Old 10-15-2019, 06:00 AM
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Cool

Hi Buzz,

Errrm ... before your post, this thread is well over eleven years old ... I kinda hope the OP isn't still trying to solve the original problem ...

Regards,

Stuart
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post #10 of 10 (permalink) Old 10-16-2019, 06:40 PM
Minitwins
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yeah I saw that just wrote my issue and it pulled this up but , I have been talking with you on the regular thread , still trying to solve the issue of no spark , but wrote to you on the other thread ,L.O.L confusing , but I want everything right and you were the first and only one to comment again thanks
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