Hi all,

Well, I took the plunge and stuck a 12v 7.2Ah battery in there and so
far the motor is still working. The only problem now is that it tends
to wheel spin a lot. The problem appears to be with the lack of grip
on the driven wheel (only the rear right side is driven). It is
plastic with the center section slightly raised with very small groves
cut out for grip. The groves have pretty much been worn out.

I had thought about a car fan belt, reversed so the toothed part is
facing outwards, cut to size and glued to the wheel. What kind of
glue ?

Anyone have any other ideas on how to add more grip to the wheel ?

Alan