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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 08-01-2011, 05:51 PM   #1 (permalink)
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Procom Igniter

If a CDI is suspected to be shot, are those Procoms shown in NewBonneville or British Customs suitable as a replacement? The stock item, as priced through BikeBandit, is over $600. I'd rather get a cheaper one - of course.
The motorcycle is a 2007 Bonneville with 32k miles.
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Old 08-01-2011, 08:41 PM   #2 (permalink)
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I fitted an earlier version of the Procom Igniter to my 2003 Bonnie and had no problems. I seems to work well. I bought it at a discount on ebay UK.
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Old 08-02-2011, 04:58 AM   #3 (permalink)
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Had my procom igniter for about 6 years now after several original coils failed. I fitted the Nology Firewires, Nology coil and Procom igniter and have not had a problem for since fitted.
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Old 08-02-2011, 08:31 AM   #4 (permalink)
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I too have an '07 Bonnie with about the same mileage - she has been garaged for months due to an electrical. Bought the Procom igniter and while it fit, it didn't solve the problem. I took the bike out after install and once the engine warmed sufficiently, it crapped out again (and additional $60 tow). That leads me to suspect the coils. Unfortunately the Nology coils have been on back order since June - maybe I might see them by the end of August. I do have new spark plug wires ready to go as well. I think you may want to do as Grinder (and hopefully I) did and replace the whole shebang. While you can test coils, they respond differently hot and cold. For the price and the wait, just go ahead and order them now.

My two cents...
/Bob
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Old 08-02-2011, 09:14 AM   #5 (permalink)
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Quote:
Originally Posted by bobstretch View Post
I too have an '07 Bonnie with about the same mileage - she has been garaged for months due to an electrical. Bought the Procom igniter and while it fit, it didn't solve the problem. I took the bike out after install and once the engine warmed sufficiently, it crapped out again (and additional $60 tow). That leads me to suspect the coils. Unfortunately the Nology coils have been on back order since June - maybe I might see them by the end of August. I do have new spark plug wires ready to go as well. I think you may want to do as Grinder (and hopefully I) did and replace the whole shebang. While you can test coils, they respond differently hot and cold. For the price and the wait, just go ahead and order them now.

My two cents...
/Bob
Thanks, stretch. I had a similar problem as yours a couple years ago, and it turned out to be the pick up coil, which is not a totally unheard of problem with the 2007's. I had that replaced under warranty. In that case, I got intermittent spark after the motor was warmed up. Here, no spark at all. I have a good HT coil which I bought at Hermy's Triumph and tried that, but no go. I'll get the Procom and see what happens.
I like mechanical problems so much more than electrical, LOL!
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Old 08-02-2011, 05:02 PM   #6 (permalink)
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Yes, a sheared bolt is so much easier to deal with than an intermittent ground fault that only occurs when driving NNW above 40 MPH, with a tail wind, while wearing yellow and experiencing less than 37% humidity immediately after a fresh shave. Give me the simple catastrophic failure every time - at least when a fuse blows, you know something happened. Small lightning bolts, burn marks, a sizzling sound - anything is better than looking blankly at a piece of plastic and then using another piece of plastic to buy a replacement piece of plastic that may or may not actually have been the problem.

Damn electrickery anyway! Just wish it wasn't so darn useful!
Good luck!
/Bob
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Old 08-03-2011, 05:50 AM   #7 (permalink)
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Hi Dc,
The new(ish) adjustable procoms seem fine. I got a secondhand one cheap, and have had no problems. Haven't heard of anyone else with problems, unlike the earlier ones. And you get a chance to play around with the timing, if you want to.
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Old 08-03-2011, 06:28 AM   #8 (permalink)
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I had one of the old (non-programable) Procoms on my 865 Thruxton - better fuel consumption AND a perkier engine VERY happy. However, same box WILL NOT start the 904 big-bore engine I now have - once it's warmed up. Starts fine from cold, but once it's warmed up, zip-nada-zilch. Go figure.

You've also mentioned the coils - another weak point in the ignition system on Thruxtons/Bonnevilles - fairly easy to test. Unfortunately the third part of the ignition system, the pick-up coil (which has also been mentioned), is also a bit of an Achilles heel Mine went to the great scrapyard in the sky in May - it IS possible to test the pick-up coil "in situ", but might not tell you anything useful. (Mine tested as being "fine", but the bike had zero spark. Replaced it, and she started up immediately. Go figure.) My mate's 01 Bonneville's pick-up coil DISINTEGRATED at 75mph a couple of years back...

The pick-up coil is (relativley) cheap & easy to replace - put the bike in the sidestand, take off the alternator cover (no, you don't need to drain the oil - with the bike leant over to the left, hardly a drop comes out of the RHS...) the coil is right there. Set the air gap to 0.8mm - Triumph used to say 0.8-1.2mm but this gave intermittent spark problems - I've set mine to 0.75mm and have a spark you can weld with Threadlock the bolt on reassembly. New gasket. Robert's your father's brother and the world is the mollusc of your choice.

Good luck!
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Old 08-03-2011, 04:04 PM   #9 (permalink)
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Robert's your father's brother and the world is the mollusc of your choice.
Took me a while to get that, but there again English is not my mother tongue...
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Old 08-04-2011, 12:53 AM   #10 (permalink)
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Took me a while to get that, but there again English is not my mother tongue...
I still don't get it?
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