Great charge from battery everything works, lights horn etc. Have power from switch to Boyer and from Boyer to coils. Turn her over and get power to both coils but no spark. So power is going through but no spark to plugs. Am stuck now as not sure what else controls the power from the coils, is it just from the battery or is there something else like the zener diode or rectifier that is faulty?

Hi, I am at the end of my tether. I have my dads OIF A65 which I have been riding on and of for a few years now. It is fitted with a Boyer ignition system and has been fine up until last summer when it wouldn't start, no spark. I presumed a flat battery but no still no spark. So far I have fitted a new battery, new coils, new leads and new Boyer system but I still have no spark. This is driving me mad but having spent a fortune and don't want to keep throwing money at her without some sort of idea what is wrong. I know it must be something simple because she was the most reliable bike I have and ran fine the previous ride out. Any ideas?  have power going to the Boyer unit, power coming out to the coils but nothing from there. Boyer say to put the two wires from the base plate together and you will get a spark but I don't. Is this another faulty Boyer unit or is it something else? Help.