new information surfacing..... Shorai batteries are not compatible with EnDuraLast aftermarket charging systems for Airheads.
does anyone know why?
No clue contained in Shorai spec's http://www.shoraipower.com/downloads/lfxspecs.pdf
note Amp hour ratings are listed as PB EQ, not conventional Ah hour
Part #: EDL-VoltRect
Combination Electronic Voltage Regulator & Rectifier. Replaces BOSCH 3-phase diode board / rectifier and voltage regulator. Advanced metal ceramic heat transfer technology replaces the BMW R Airhead & Moto Guzzi diode board system. Mounts remotely outside the alternator cover for high reliability and performance. Not Compatible with lithium iron batteries as supplied by Shorai.