Modern Vespa

My GT200 has a ground connection from the forward bolt of the belt cover to the frame just above.

My LX150 (also Leader engine) does not have this pigtail. I am wondering if it is missing? If there is no ground connection here, can someone tell me where it is / should be on the LX?

(I am chasing down an intermittent stalling issue, and wondering if it's a bad ground. I measure continuity between the frame and engine with an Ohm meter. But if I am missing a solid connection, I am thinking maybe that could lead to intermittent problems.)

Usually if you have a bad ground to the engine, the starter motor will barely turn the engine over when you try to start it.
An easy way to find out if you have a ground to the engine problem is to run a wire from the negative terminal to the engine. You can attach it to the same place it attaches on the GT, leave it on and ride around a bit. If the problem is gone, that was your problem.

There are no electrical components in the transmission so I doubt the wire is part of the electrical ground. I'd guess that it's there to prevent the belt from becoming a Van de Graaff generator; to prevent build-up of static electricity.

No trouble starting it, so maybe grounding is not the problem here. I was just struck by the difference with my GT.

Good tip on a test method - I think I will try that anyways. Thanks.

I think it would amount to the same thing? The transmission is of course electrically connected to the main block since it's all metal?