Electrical Problem-misfire

[The Mechanic]

Two things come to mind.

Ignition coils will cause mis-fires once they get hot, you stop to investigate, the coil/s cool down you fire her up and ride off only for the mis-fire to occur again furhter on down the road.

Ignition coils are also prone to vibration, this can cause internal shorting and/or other related problems. Additionally corrosion will interfere with any earthing requirements.

Myself, I would replace the Hall Sender. sometimes interpreting the rev-counter movement is difficult enough in a car let alone whilst riding on the road.

One last option is to get the bike onto a rolling road with an experienced operator. This may be costly (approx 35-55 pounds for an hours input) but may locate the running fault more easily and more importantly ....safely.

Theres probably 50 or more GSers waiting with baited breath to find out the results of your quest.

 

[Explorer]

If that is the case I have not suffered in vain! And we will have all learnt more about the 1100GS ageing-and the bloody hall sensor.
I am going down to SPC today to book it in-I've had enough. (Assuming it will cost an arm and a leg rather than two arms and two legs) . The riding to tweaking ratio has gone to pot and while I like maintenamce it has to be heavily outweighed by riding.
Cheer s Tony

Explorer

 

[Big Lad]

Was it the hall sensor in the end ??????????????

 

[Explorer]

And the Winner is.......!

The Hall Sensor! Yes folks - a Nation celebrates! It was the Hall Sensor...SPC replaced it yesterday and the Mother of All Test Rides today failed to generate the fault-no matter how hot the engine. The Gods of Hot Metal have smiled upon me. So we what have we all learn't?

1) Hall Sensors can go intermittent-causing a misfire rather than the more usual complete engine cut out.
2) Second hand repalcement sensors probably not a good idea-my last one cost £60 and lasted 8 months. £123 for a new one-and hopefully it will last a lot longer than that.
3) The giveaway in the end was the temperature related nature of the problem-most of the time-but even yesterday as I took it into SPC-it misfired a couple of times before I had even got half a mile-and it had done that a couple of times before - which had helped throw me off the scent.
4) As it was an intermitent fault the rev counter tweaked but didn't drop completely to zero.
5) Older Gs'es (1995) are seeing the hall sensors go more and more.

Thanks for all the help guys-what with all the other things I've tweaked or replaced on my bike-hopefully I will now get a long period with no problems,

See you out there,,

Explorer
nb Saw the new 1200 yesterday - someone was getting a test ride-sounds nice-bit small though for us big blokes? Nicely put togther. Can't see Action Man getting one-however now more useable off road I would think.

 

[Big Lad]

Just fitted a Remus revolution with a straight- through pipe to my 1100. I also have a K&N filter. Would this account for the slight hesitation at steady revs ?. This happens at between 2-3000 revs in 2nd/3/4th gear. It hesitates very slightly, almost like it's running out of fuel. then picks up again within a second or two.
Higher revs and when accelerating, it's fine with no probs. This makes ita bit nervy in traffic or leant over and I'm using the clutch more to compensate at slow speed.
It also pops and bangs on the over-run a little, which sounds ace, but I had a TLS which did this with a full system on and I took it to TTS, who said it was running lean, hence the 'popping' on the over-run.
Hall sensors ?. HT leads ?



This a copy of a post I put on earlier. I think I may have a problem with the hall sensors. '94 1100GS with 60k on the clock.

 

[Explorer]

If it was the HT leads I think it would be cutting out more when going faster and under load. I have to avoid seeing the answer to all cut out problems now as Hall sensors-but one of the things that delayed me resolving it was that the fault was repeatable but not always the same way-anyway good luck with yours
Explorer