OK I'll ask so what is the sytem ie parts/make are you using lozz
Any external 2 wire pick up, any flywheel with a lobe on the outside, just onto LiPo's with a 130Amps CCA (enought to start a car) 12v no need for special chargers($107) or any 12v DC battery or you can use a post 02 Honda CR250 stator/rotor, rec/reg and capacitor (about $200 on ebay if you don't want to run total loss) , coil from TwoStroke Shop ($17) and a Ignitech Sparker P2(about $200 with loom). I use Zeeltronics which are a bit different. There is also IMF ignition that will run a Hall Effect sensor
Make a plate to hold the pick up, run a few wires, few connectors or solder apply 12v, do some simple commission tests away you go, a couple of hours work and a few $100 still in your pocket
if you know what I mean