I just thought I would add my thoughts on a couple of the issues raised.
Firstly does the dynamo regulators belt drive kit with its 20% up-gearing wear the dynamo out more rapidly?
Well, the armature spins faster, but for a given electrical load the the mechanical input power to the drive is much the same (although the overall power conversion efficiency may well be improved). The field current in the dynamo will be lower, which also leads to lower armature heat dissipation. Friction loss in the belt may be a little greater as well as the windage (air drag in the dynamo but that is a small effect I believe). Our dynamos can well withstand the extra speeds encountered, the dynamo to crank speed being the same as in a magdyno. I say no need to worry about increased wear in dynamo.
So is the belt drive quieter than the chain?
Not necessarily, but more than likely. If the chain drive is not too worn and well adjusted and the chain has no tight spot all should run pretty quiet. But probably the great majority of all inner timing have grooves where the chain has rubbed. That is a noisy process! Many customers have been delighted with the enhanced quietness from the timing side in practice. Of course those with loud exhausts will have trouble perceiving any difference.
Many thanks for all those who have purchased our dynamo drive kit over the years, and more recently. Back to a normal working day tomorrow where the orders will be processed for same day posting. Hope you avoid the thunder storms in UK if out and about later.
