Nothing like a little optimism?
The electric start was an optional extra on the 80/81 bikes so I suppose 370lbs with this junked and a dry bike might be plausible.
I think it's great the speed you're moving on that bike Solo. If it turns out anything like your Paralever GS it's going to be a great bike.
One of the UKGsers put his siebenrocked 1000 G/s on the Dyno and It measured 43BHP at the back wheel. The standard bikes obviously going to be a lot lower than that. I've heard 37BHP quoted.
This is it on the Dyno