Folding Bike information?

OldBob1

Esteemed Pedelecer
Oct 11, 2012
355
117
Staffordshire
Hi I have acquired a Twister folding bike which is fitted with a San Jiang hub motor in the rear wheel, 24 volt Ni-Mh.
I have managed to repair the battery to bike connector and a few other dodgy connections in the wiring and it now runs(Peddle assist only).
Does any one have information on this bike( Is controller in crank shaft hub?) where is the best place to get spares, and can I replace single gear to at least 5/6 speed and a throttle?.
Some think to do during the cold winter months!!!

Bob.