Schipmunk:

Quicker than I thought. Here's a couple of pix. Look close at the hall sensor, you'll see 3 wires go in and the 4th wire is connected to ground on a lug, under the bolt. This ground wire just gets wrapped around the rest back up to the ignition box. IMO, it just shields the 3 main wires, helping to suppress RFI. The stock one doesn't have this, you could easily add one.

Hopefully you'll see the Bosch cap, it's not tightened on (I had to take it off to get the cowl off, so I just stuck it on the plug for the pix).

The brown you see in the fins is spilled red locktight I used on the muffler bolts. It speeped through the holes and made a mess. You'll see the ignition on one side of the motor box and on the other side you'll see the 1400 mHa battery for the ignition. (You'll also notice the throttle linkage is undone.) The clevis is a metal sullivan, but the rod is a all plastic 'Golden Rod' by Sullivan to a standard HiTec 425BB. Makes a good throttle servo. This BME50 has had a new crank put in it and a new carb. (Don't ask, or maybe you should!)