Great bike and oh so much fun. About the one pull starting I would let mine sit for months on end and open the gas cock and one pull with chock closed and next pull it would fire 90% of the time. Mine was like yours with the 3 speed transmission and the kick starter.
About the front wheel under power when you are going straight but in a turn of over 15% the flat spring that is wound around a flat drum disconnects the front wheel and the rear wheel then pushes you through the turn.
Back in the 1970's there were Rokon's being outfitted with the Honda 4 stroke engine with the High /Low gear box. That would give you higher speeds and lots of compound choices of gearing. The bile was just too tall for my short legs so I changed the seat to a motorcycle cobra style seat and I had to put padding on the loop normally behind the seat
I still today don't know why I sold it along with so many other fun machines. But the Rokon
is The best exploring bike out there.
Steve