Have a coolster 110 and it wont crank. Replaced battery, harness, coil, cdi, ignition, kill/starter switch, stator and harness. It wont even try to crank. Previous owner lost key and when I tried to replace the key ignition, it melted the ignition wires.

So I replaced everything but I can't get it to crank

 

You need to hold or press the brake unless you bypass it.

 

Yes i tried both brakes, also bypassed brake switch and nothing.

 

Little update. I missed the ground that bolts to the stator cover, but now when I hook battery up it cranks and it's cranking with the key off and kill switch...?? As soon as I connect the negative to battery it cranks on its own.
I'd rather have to pull the motor apart than diagnose electrical lol