Hi I run motoplat bit dated now but 175 is straight line anyway.
125 you can run what you like.
if run motoplat /pvl which you can get from dartford karting
you need shaft make and pushed into flywheels
there is info on here how to do it.
I have No wiring on my bike less to go wrong. only the two wires from the motoplat to the coil
it works well for my bike
ask any of the racers how well my bike goes
get to a meeting and talk to the riders
we dont bite
much