Hi chaps, hope someone can help, this is the problem I mentioned in my introduction.
Just before xmas`14 coils packed up on my st1100 1999 model, both coils and caps replaced and restarted, however, before the coils packed up it always idled at 1000 or just below with no issues (6 years) now, at 1000 revs as soon as I put the lights on, revs drop to 7-800! When the fan kicks in drops to 500 and almost stalls. Have increased the revs to 1200 at idle, lights on drops to 900-1000, fan on 7-800! Have fitted a new battery (change every 2 years so was due) thinking that could be the problem, still the same. Riding above 1500 no problems at all, in all gears accelerating, cruising etc can sit at 90mph at 4500 revs all day, as soon as I am sat in traffic revs drop.
Battery holds the charge, have removed HID lights and reinstalled original bulbs, have heated grips but that is all accessory wise. Original alternator regulator/rectifier and 102,000 miles. Initial electrical checks have been done, starting charge, running charge, output from coils all good. I did notice a high pitched whistle coming from under the bike somewhere as soon as the lights go on??
Any ideas gratefully received. Many thanks for any input. andy
Just before xmas`14 coils packed up on my st1100 1999 model, both coils and caps replaced and restarted, however, before the coils packed up it always idled at 1000 or just below with no issues (6 years) now, at 1000 revs as soon as I put the lights on, revs drop to 7-800! When the fan kicks in drops to 500 and almost stalls. Have increased the revs to 1200 at idle, lights on drops to 900-1000, fan on 7-800! Have fitted a new battery (change every 2 years so was due) thinking that could be the problem, still the same. Riding above 1500 no problems at all, in all gears accelerating, cruising etc can sit at 90mph at 4500 revs all day, as soon as I am sat in traffic revs drop.
Battery holds the charge, have removed HID lights and reinstalled original bulbs, have heated grips but that is all accessory wise. Original alternator regulator/rectifier and 102,000 miles. Initial electrical checks have been done, starting charge, running charge, output from coils all good. I did notice a high pitched whistle coming from under the bike somewhere as soon as the lights go on??
Any ideas gratefully received. Many thanks for any input. andy