Have a 2003 Busa - 4000ks. Has started running rough (sometines like it´s running on 3 instead of 4), On some occasions (particularly when changing down to stop) the bike just CUTS OUT. Will restart OK. NO F1 light. Could the issue be electical or fuel system? Is in workshop & mechanics believe it could be a faulty swith/wiring issue eg with side stand, clutch or kill switch... I keep thinking a fuel mapping issue? Any feedback welcome. Ta Steve - Brisbane Australia