Re: Backward engine.
The HT could be made to run backwards by cutting a new keyway in the magnet rotor or crankshaft, to get it to fire at about 25 deg btdc of new rotation direction.
You might hafta take extra measures to keep flywheel and sprocket nuts from backing off.
I useta start my allstate moped by backing it down an incline in first gear. It would run but poorly.
When I roll my Hongdu/Solex backwards with the comp release on, It pops a little