along with many others, have consider differences between PM and EM high performance alternators for airheads. in context of prepping a RTW bike.
currently there's only one source each in the world for PM high performance alternators and EM high performance alternator kits for airheads.
difference is EM high performance alternators can use stock parts in a pinch. voltage regulators are the same. stock diode boards, rotors and stators can be used in a pinch. performance will go back to stock. but you will be back on the road.
would not want to be broken down in say Siberia with only one source in the world that's got parts for your downed alternator.
for EM alternators, spare brushes and voltage regulators can be easily carried. stator and rotor can be rewound locally. brushes fits most bosh alternators. voltage regulator can be used from most Volkswagen.
naturally my choice, an 450 watt EM alternator is installed on R80G/S.
for PM alternators, as joel pointed out alternative PM alternator voltage regulator can be rewired to work. burnt up stators can rewound too.
both are valid choices, so long as high performance versions of either PM or EM alternators kits are used on Airheads.
keep in mind, I'm the type person that will yank out out electronic ignition bean can, ICU, 1.5 ohm coil and replacing with points bean can with matching 3 ohm high performance coil on R80G/S.
_cy_ screwed with this post 06-07-2012 at 02:24 PM