i blown up my engine on my 2002 aprilia rs 125, got new barrel and piston put it all back togever but no spark. got new plug, cap cdi. cheacked terminals on kill switch and all ok, there is power going into the cdi bu then it goes weird. the purple n white wire that goes to the coil has no power flowwing through it, ther is power going to the pick up but not power going to the other single wire that goes to the back of the flywheel think it is yellow and black and also no power going from cdi to the starter relay which is green and black i belive however it does turn over fine. i have checked the obvious, earthing and fuses ect but realy cant find anything wrong. also sidestand has been bye passedsoo all ok ther, could do with a step by step way of checking everything. than kyou tom