hy rob,
i can help a little i hope
my streetlegal kx500 has a lightcoil on the flywheel
and an roadcycle front brake with brakinglightconnector
also the masterbrakecylinder at the back has a brakelightconnector
and a switch on the bars for lights on/off
so you won,t need an battery then and its maintenancefree
i must confess i didn,t install the kit myself ,
since i,m not good at electrics
but it costs me just over 250 euro
exchange rates you must calculate yourself