Gregory Bender

Diode board replacement

Moto Guzzi V7 Sport, 750 S, 750 S3, 850 T, 850 T3, 850 T3 California, V1000 I-Convert, V1000 G5, 1000 SP, Le Mans, Le Mans II, Le Mans CX 100, Le Mans III, Le Mans 1000, 1000 SP III, 1000 S, California II, California III, California 1100, California Jackal, California EV, California EV Touring, California Aluminium, California Titanium, California Special, California Special Sport, California Stone-Metal, California Stone-Touring, California Classic, California Touring, and California Vintage models



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The diode board is an integral part of the charging system. The ones on my Tontis have proven very reliable. The original Bosch part is still readily available through sources such as MG Cycle: MG# 17704300.

As a heavy duty alternative, Walt at Sonny Angel Motorcycles informed me about this diode board made by Thunderchild. It is advertised for BMW motorcycles, but the same unit was fit to Moto Guzzi Tonti frames.