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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 12-12-2012, 11:24 AM   #71 (permalink)
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Quote:
Originally Posted by JFowler176 View Post
RJ,
I had the SAME EXACT problem. We finally figured it out after 3 months in the shop and multiple guesswork repairs. It was a loose bullet connecter on the small wire that branches off of the positive battery cable that runs to the instrument gauges.

Trace the positive battery cable from the battery until you find the small wire that branches off. Follow that small wire until you find the bullet connecter. Simply cut it off and hardwire this connection together. Might fix your problem. Definitely corrected mine.
True 'nuf - all of those battery connections are important!
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Old 12-16-2012, 01:13 AM   #72 (permalink)
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Nobody has suggested this, so, the next time you experience the problem pull right off the road and see if you can actuate the carburetors by reaching in and opening the throttle at the carbs. If you can open them up and nothing happens or something happens you've got a buttload of new information to work with.
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Old 12-17-2012, 09:49 AM   #73 (permalink)
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Thanks for your suggestion. As I thought, since my girlfriend has not been here to ride on the back seat, the problem has not come up yet. Iím not convinced it is gone yet because this sabbatical has occurred numerous times in the past. I will of course post to this thread if and when it occurs again. The ONLY thing I have done differently so far was to put 2 metal washers under each of the 8 bumpers under the seat to raise it some more. And of course my girlfriend has not been here to ride on the back of bike as well. The real test will be when she returns and is on the back of the bike again in 3 weeks.

Thanks RJ
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Old 12-17-2012, 09:51 AM   #74 (permalink)
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Quote:
Originally Posted by JFowler176 View Post
RJ,
I had the SAME EXACT problem. We finally figured it out after 3 months in the shop and multiple guesswork repairs. It was a loose bullet connecter on the small wire that branches off of the positive battery cable that runs to the instrument gauges.

Trace the positive battery cable from the battery until you find the small wire that branches off. Follow that small wire until you find the bullet connecter. Simply cut it off and hardwire this connection together. Might fix your problem. Definitely corrected mine.
If the problem occurs again after I made this small modification of the seat, I will try tracing the wire to see if there any loose connections. At a cursory glance I did not see anything that looked out of the ordinary.

Thanks for your suggestion!

RJ
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Old 12-17-2012, 10:08 AM   #75 (permalink)
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Quote:
Originally Posted by RJ Triumph View Post
"...And of course my girlfriend has not been here to ride on the back of bike as well. The real test will be when she returns and is on the back of the bike again in 3 weeks."
I think a stand-in GF is required. Please find a suitable, temporary, replacement and proceed with testing. Pictures will now also be mandatory...
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Last edited by sprouty115; 12-17-2012 at 09:02 PM.
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Old 12-17-2012, 02:10 PM   #76 (permalink)
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I think a stand-in GF is required. Please find a sutiable, temporary, replacement and proceed with testing. Pictures will now also be mandatory...
LMAO, Iíll ask around
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Old 12-17-2012, 02:23 PM   #77 (permalink)
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Quote:
Originally Posted by sp115 View Post
I think a stand-in GF is required. Please find a sutiable, temporary, replacement and proceed with testing. Pictures will now also be mandatory...
Quote:
Originally Posted by RJ Triumph View Post
LMAO, Iíll ask around
Swing by Home Depot and pick up one of those "Day Workers".
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Old 12-18-2012, 11:04 PM   #78 (permalink)
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I had the same problem....it seemed to be all differewnt things causing it and no fix worked then I found out triumph have 'dicky' crank sensors, I changed it and no more problem...hope this helps
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Old 12-19-2012, 12:43 PM   #79 (permalink)
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I installed an ARD Magneto setup, dumped the crappy ignition system, and no problems since. You could do that with a 1978 Bonnie ...
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Old 01-09-2013, 09:30 AM   #80 (permalink)
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I have not forgotten to update you guys. I was waiting for my girlfriend to come back to see if the problem still arose when someone was on the back of the bike. The good news is that the cutting out and more importantly, the throttle twisting, and then not responding at all “kind of” stopped as well.

I’m not 100% convinced that either of the problems have gone away because I only got to ride about 20 miles with her on the back thus far but with solo riding it has not happened and I have ridden a couple of hundred miles.

All I did was go to local hardware store and by 8 metal washers. I took off each of the rubber bumpers on the underside of the seat and installed 2 washer, to give the seat more lift, under each of the rubber bumpers and then re-installed the bumpers.. this seems to have done the trick so far....

BUT, what I think I found that might have been causing the throttle problem came up yesterday. I was riding along when all of a sudden the engine started revving and racing, without me twisting the throttle. Almost the exact opposite of the original problem or no power or results when twisting the throttle.

I pulled over on the street and looked at the cables to see if anything mechanical seemed “off” or observable and when I quickly revved the engine the revs came back down to normal. It was as if someone was twisting the throttle even though I wasn’t. I saw what the problem was but have no idea how to fix it.

At the end of the throttle cable, on the LHS of the bike, there is a tiny cylindrical piece that hangs off the end (in my case a little corroded) that is attached to the very end throttle cable. I think it is supposed to be housed inside of that little piece that looks like it was made for it, but mine for whatever reason is outside of the little case and just free floating. I never noticed it before and I am not sure what the functionality or purpose is? This little cylinder is getting caught in the metal piece (next to it where I think it is supposed to be housed?) when I twist the throttle this little piece gets caught/stuck on that other metal piece where it looks as if it should be housed, and therefore gets caught up holding the throttle in the open position. It is only when I rev the engine again that it falls out and the cable is released back down.

Anyone have a clue what this is supposed to look like and how it is supposed to function? I’m not sure if this is this was the cause of the original problem, twisting of the throttle and randomly no response, but it sure is the cause of the new problem of twisting the throttle and not having the engine stop revving after...

Thanks all,
RJ
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