GU29703800 Fits V50, V50 II. V50 III, Monza, V65C, V65SP, V65TT, Lario, V7 Sport, 750S, S3, 850T, T3, T4, T5, Convert, G5, 1000SP, SP II, SP III, California II, 850 LeMans, LeMans II,CX100, LeMans III, LeMans 1000 all years LeMans IV and LeMans V. Also fitting Benelli 900 SEI. Also suitable for BMW "Airhead" R series Bosch charging systems, BMW numbers 12321350052 and 12321244409.
Solid state adjustable voltage regulator for Bosch alternator systems as used by Guzzi from 1972-1992. Direct plug and play, accepts existing 3 prong plug and mounting points. Stock position mounting points. Trimscrew allows you to fine tune your maximum charge rate. Factory setpoint is 14.2 volts DC.
This regulator is a favorite of owners whose bikes get little highway running to keep a topped up battery. Also Convert owners who run at lower RPMs, and riders with multiple electric devices or lighting.
NOTE: Minute adjustment of the trim pot makes for significant changes in charge voltage. Installation is accomplished with carefull attention to voltmeter readings while adjusting. Clockwise turning of the trim pot increases voltage. Do not excede 14.5 volts stabilized charge rate. Make sure battery is fully charged before making adjustment.
This adjustable regulator can be substituted for original part numbers 17703800, 14703805 or 29703800