On a ride the front cylinder started to misfire. I assumed this was an ignition problem. Checked pick up coil resistance - OK at 98 ohms. Checked the primary and secondary winding resistance of the HT coils - both OK. HT lead OK. Plug cap resistance also OK. Swapped the the ignition control units over, still no luck. Earth connection seems sound. Now the front cylinder seems reluctant to fire at all. Any suggestions as to what to do next?
Ian S