Hi!
Not exactly about A10?s fitted with distributors but two threads I found on BritBike Forum which may be useful to those interested in A10?s with alternators. This is a beautiful 1962 Gold Flash with alternator and magneto from the US:
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Main=24003&Number=212689#Post212689This apparently started life as a police bike in Indonesia. The post also mentions the alternator version was devised for the "Black Flash" Police model, requiring extra electrical output for a flashing blue light and a radio although there were civilian versions available that had alternators.
There are some A10 alternator outer chaincases around (Yeoman?s had some when I asked recently) but the rears are unobtainable, mainly I think because nobody can identify them except by part number as they look identical to ordinary A10 rear chaincases until you compare them closely. The front of the alternator rear chaincase is slightly more bulbous and the screw spacings are different to the standard A10.
You can use a B31 alternator rear chaincase instead but it needs the crankcase/chaincase junction machining (no, I haven?t done this yet but it looks perfectly possible) and the some of the front screw holes welding up then taping again but it is the right shape to look identical to the real thing when it?s on the bike. When I do it I?ll post photos.
Other people have used Matchless alternator chaincases but again these need machining and welding and you couldn?t pretend you had an original alternator A10 after doing all the work, see this post:
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Main=23990&Number=212473#Post212473Best wishes
Martin
