Difficulty starting? Poor running?

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Charging Circuit

The early models of the Z750 (B1&B2) were fitted with a 3 phase dynamo rated at 110W. Later models (B3 onwards) had a single phase 130W alternator which gave rise to the most obvious electrical difference between the models. The B1 & B2 have 3 external screws holding the stator to the casing whereas the…