Thank you all for your, as always, well-informed replies.

Grant, I don't for a minute doubt that Rick Jones of Motorrad Elektrik has achieved the maximum output from the basic components and I'm quite sure that I couldn't improve on his results, it's just that I was wondering if by using a different gauge (thickness) of wire on the standard rotor and stator it would be possible to wring some more amps/watts out of it. Increasing the thickness would reduce the resistance allow the current to flow more easily, but would run hotter whereas reducing the thickness would make room for a greater number of turns in the space available but would result in a higher resistance, but again, might result in a higher number of ampere-turns, which is a good thing because the more amperes of current times the number of turns in a winding then the stronger the magnetic field it produces. The output depends on the strengths of the mag fields in both the stator and the rotor.

All clear then?

Funny, I don't remember writing all my notes at college in Greek and gibberish- sorry.

Many thanks, too, for the recommendation of the electric vest, I got one and tried it today: bliss! If there's anybody still out there unsure of whether to get one or not-GO FOR IT!

I also bought a new set of BMW heated grips at a bargain price (I repaired the old ones twice and they are by now beyond hope) and as the kit was for a different model of BMW I now need the little surround that fits around the panel-mounted off/half/full-power switch, Part No.03 8330 to allow me to mount it on the dash. ('82 R100RS) So can anyone tell me the part no of this bit, please? For possibly a greater audience I'm going to pose the question in a new thread- that ok by you, Grant?

Thanks again

J

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Johnefyn

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Johnef