Ignition pick-up coil / Crank position sensor (nerdy AND boring) - Page 12 - Triumph Forum: Triumph Rat Motorcycle Forums
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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 10-30-2012, 06:20 PM   #111 (permalink)
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Hello
Thankyou for your replies. I have replaced the pick up coil but the fault persists. I have made it home (just!) and will tear into the bike later today. I will start a new thread regarding my experience with this frustrating intermittent fault and hopefully the solution. My next suspect is the coil.
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Old 11-05-2012, 12:47 PM   #112 (permalink)
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My intermittent ignition problem turned out to be the Ignition box/module, the one part you can't test. The new Procom fixed me up.
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Old 11-06-2012, 05:29 PM   #113 (permalink)
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Quote:
Originally Posted by Tommytwobeers View Post
My intermittent ignition problem turned out to be the Ignition box/module, the one part you can't test. The new Procom fixed me up.
You can test it!.
With patience,and a couple of manuals.
I recommend the "Haynes motorcycle electrics" manual.
My Scrambler has been running now for a couple of weeks without fault.
With a "Procom" unit.
But it was the Haynes manual that supplied the info.
Along with Forchetto.
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Old 11-06-2012, 06:21 PM   #114 (permalink)
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Hello
Thanks for your post. I was sure that it must be possible to test the igniter. After all, the manufacturer has designed in specs and if known these can be measured. Surely measuring a known good component and comparing them to a suspect item should give some revealing information. I will be looking for that Haynes manual. My coil seems consistently to be measuring 0.3 ohms on the primary. Spec is 0.5, is 0.3 too low or ok?
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Old 11-07-2012, 12:13 PM   #115 (permalink)
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Testing a igniter could be tricky, especially in my case when the problem was intermittent. I could ride for four days before the miss began. After parked for 15 min, the bike would always start and run fine again.

Tasmaniablue: You say "cut out" and another time " just made it home" Did your engine fully quit, both cylinders, and roll to a stop? Or did you loose power, run rough, miss-fire?

I tested both my coils , primary and secondary, they both read the same although I can't remember just what the readings were. But they were alittle different from the manual.
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Old 11-07-2012, 05:44 PM   #116 (permalink)
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Hello
In every case that my ignition fault appeared the engine just cut out with no warning. No coughing, spluttering or missfire. It was as if I had turned of the engine at the key or the engine stop switch. I agree that it would be hard to test the igniter properly because the fault is intermittent. WWhen the bike has stopped the coils do not feel hot. I have not removed the seat to see if the igniter has warmed up but I will when/if it happens again. A new Procom is on the horizon. I wonder why the ignition system is prone to glitches. I have owned a lot of bikes and many cars and ignitions have been for all intents and purposes 100% reliable over many years of operation. Triumph twin ignitions just seem to be a bit niggley. Thanks for your interest.
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Old 12-01-2012, 06:42 AM   #117 (permalink)
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ignition failure

Hi I was stuck at the side of the road for nearly five hours on Thursday night with total ignistion failure. The bike had been left for only 20 minutes from running normally and onattempted restarting there were no sparks. AA man tried fuses, I tried clutch in incase gear lever switch fault. AA man gave up and called a pickup truck
I am about to start work tracking down the fault. Does this sound like it might be the sensor coil?

Bike is 2005 790 and has done 30K
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Old 12-01-2012, 06:58 AM   #118 (permalink)
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Hello
Today I rode to Hobart for the Toy Run. Bike stopped once again with the same symptoms. Wiggled the igniter plug and she started right up again. So.......questions are; Is the problem in the igniter or the plug, which is most likely? How to test the plug? Can the plug be taken apart? Can the plug be replaced?
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Old 12-01-2012, 08:47 AM   #119 (permalink)
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Update

My secondary ignition coil cicuit is open circuit according to the test prescribed by Haynes Maual. Going to try a new coil
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Old 12-08-2012, 08:21 PM   #120 (permalink)
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2nd update

Replaced the coil with a nice Nology one, still nos sparks. managed to fish the connector out into the battery box and it tested open circuit across the pins, double triple and quadruple checked.

Will get it out of the alternator case tomorrow. Was disturbed by visitors and it got to late to be clouting the thing with blocks of wood. Hope someone local has one in stock, am sick of getting the bus!
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