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Messages - jonnierw

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British Bikes / Triumph T140V cuts out

« on: May 07, 2011, 11:43:00 PM »

Hi,

I have a Triumph T140V 1977 that has had a Boyer ignition unit fitted. It had been sitting around for ages and the carbs and fueling lines and filters are clean. There doesn't seem to be any fueling problem and I've tested continuity of all the wires which are fine.
The bike runs fine when started but after riding it for a while (15+ mins) when I slow down for lights and the revs drop the engine just cuts out. The bike then won't start for about 20mins (i'm assuming till the engine cools down).

This is my theory:
I don't think the the Boyer unit under the seat has any problems and when I put a multimeter across the contacts it seems fine. But I think the Boyer unit electronics near the base of the R/H cylinder is overheating and when the revs drop a safety feature kicks in on the Boyer unit and cuts power to the plugs till it cools down sufficiently.

Any advice would be greatly appreciated (Lonodn drivers aren't very patient when you have to paddle your bike across 2 lanes of traffic at a roundabout!)

Thanks.

British Bikes / Re: Chromed Brake Discs

« on: November 17, 2009, 12:59:31 PM »

hi,

yes, it is my 77 bonneville.

Thanks for the advice, will sort it out before the weather gets really bad. Firstly, the rear puncture I just found this morning.

Thanks.

British Bikes / Chromed Brake Discs

« on: November 16, 2009, 12:42:34 AM »

Hi,

Thanks to the delightful recent weather of rain followed by rain and then more rain, I have noticed that the front brake doesn't really work when wet (you have to squeeze really hard for very little braking, and the rear becomes the dominant brake). I think the bike was a showroom model and so had chrome everywhere, including the brake discs.

Does anyone have any advice on how I could get my front brake working in the wet, without having to go and buy a new disc?

Thanks.

British Bikes / Re: Fuel and Additive

« on: October 20, 2009, 04:28:38 PM »

Thanks for help, I think I have sorted the problem. The plug I was running (NGK B7ES) was running a bit cold and the mixture was a bit rich.

I leaned out the mixture and after 100 miles so far the plugs seem to appear correct.

Thanks for the Spark Plug website L.A.B it was a big help.

The bike starts after a couple of kicks now as opposed to the 10-15 kicks it was taking (my right leg is now slightly bigger than my left!)

British Bikes / Fuel and Additive

« on: October 13, 2009, 04:27:52 PM »

Hi to all I've just signed up here.

I've only just started riding my 1977 Bonneville again. I was told the best fuel to run it on is the higher octane fuel (97). I've been told 2 things about using fuel additives. someone said they will help (the lead replacement additive from RedEx) and another person said don't use them at all. What do you guys think?

Also the spark plugs get very blackened very quickly, even thought its not running rich. Is it just burning a lot of oil or do I need to lean it out a bit more? also can i add anything to clean up the plugs?

Cheers