1 Ignition problem Sun Jan 30 2011, 14:57
cv
New member
Hi everyone.
I have an ignition issue with my 87 K100. Does anyone have a simple method of finding out if I have a faulty spark plug lead, or a faulty HT coil? The bike on at least one cylinder starts to miss slightly at low revs once the bike is hot (e.g. slowing down around a tight corner, then accelerating). Once the revs climb above 2500 revs, the problem goes away. Also, if the revs are kept high, the problem doesn't really occur.
Within the last year I have replaced all 4 spark plug caps (5k ohm as required) and the leads, as corrosion was starting to eat away one of the original leads/caps. There was some corrosion in one of the coil sockets as well, which I cleaned away. Plugs are less than a year old, gap set correctly. I am thinking that maybe one of the coils is starting to break down when they get warmed up. The problem doesn't seem to occur when I ride the bike to work in the mornings (temp approx 10 to 15 deg C, distance 24km), but usually in the afternoon on the way home (temp 20 to 25 deg C).
I did use standard HT cable from an automotive outlet, and wondered if the varying resistance of these would cause a problem like this? (I put them together myself, as genuine leads are very expensive!)
Any ideas greatly appreciated.
Thanks,
CV
I have an ignition issue with my 87 K100. Does anyone have a simple method of finding out if I have a faulty spark plug lead, or a faulty HT coil? The bike on at least one cylinder starts to miss slightly at low revs once the bike is hot (e.g. slowing down around a tight corner, then accelerating). Once the revs climb above 2500 revs, the problem goes away. Also, if the revs are kept high, the problem doesn't really occur.
Within the last year I have replaced all 4 spark plug caps (5k ohm as required) and the leads, as corrosion was starting to eat away one of the original leads/caps. There was some corrosion in one of the coil sockets as well, which I cleaned away. Plugs are less than a year old, gap set correctly. I am thinking that maybe one of the coils is starting to break down when they get warmed up. The problem doesn't seem to occur when I ride the bike to work in the mornings (temp approx 10 to 15 deg C, distance 24km), but usually in the afternoon on the way home (temp 20 to 25 deg C).
I did use standard HT cable from an automotive outlet, and wondered if the varying resistance of these would cause a problem like this? (I put them together myself, as genuine leads are very expensive!)
Any ideas greatly appreciated.
Thanks,
CV