Swizzbee update.
I have contacted Dreifels ag and have received a reply, the battery can be changed without problems and it is only the controller that is code locked. So the current 7s 10ah LG li-polymer is still going and my use is just for local riding, the on board charger is set to 41.5v max cell charge for 29.05v.
The bike has Scwalbe Marathons fitted so puncture resistance is pretty good and any tube repairs possible with out removing rear wheel. The rear wheel set up is very time consuming and too many bits to fiddle around with on the road.
The axle is a Sturmey 13/32 26tpi threaded and has a loose bush on one side and a fixed on the gates side that locates in the drop outs, then there are outer sealed bearings that are kept in situ by a bespoke flanged nut, the bearing inner dia acts as a sleeve to accept the nut. The bearing /
nut combo are held in a recess by a further outer fixing clamp held by 3 bolts, so not an easy quick fix on the road.
One of the rims must have been changed as they are not a pair and the front Magura Julie has also been changed to a Shimano BM447.
The rear mudguard has filament running through it to pick up the rear light contact, this was not in working order as it looks as if corrosion has set in and no voltage could be be determined with a dvm. So for now I have used some thin servo wire taped to the under side of the mudguard to get the continuity.
Pics;
7S BMS, a pair of shunts can be seen on the far right.
A pair of shunts not on the controller but connected directly to the front of the battery/bms.
Heinzman brushed motor 270w.
Rear axle/drop out fitment.
Dropout fitting components.
Fitting sequence.
Dropout axle bush.