i have triumph trophy 1200 1997 which has annoying missfire between 1 and 2 thousand revs,only after bike is warm,bike starts ok then good for top speed,when you drp speed off say for round about bike limps as if it is missfiring or switching off,no red lights so i have discounted sidestand switck and kill switch,i have also changed spark plugs and leads and checked airgap and coils,any bright ideas