21-08-23, 08:50 AM
Do this test at idle on the centrestand. You don't need to remove the plugs. Just pull a plug cap off the plug and see if that alters the way the motor is running. It should be obvious if that cylinder stops firing. If nothing changes, however, it indicates that the cylinder is already failing to fire, so you know which one is giving you problems. 
However, before doing any of this, remove each plug cap from the ignition lead and trim 1cm off the lead. Then screw the cap back into the lead. Reason for doing this is that over time, the core of the plug lead corrodes and fractures causing a poor contact and weak spark. With luck, this might be the reason for your misfire. You'll know soon enough ...
However, before doing any of this, remove each plug cap from the ignition lead and trim 1cm off the lead. Then screw the cap back into the lead. Reason for doing this is that over time, the core of the plug lead corrodes and fractures causing a poor contact and weak spark. With luck, this might be the reason for your misfire. You'll know soon enough ...