SOHC.co.uk Forums > CB750

Charging System Specification

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philward:
Should be ok then Ken - Just spoke to Andy at Good Bits and he's had 5 modified covers (of his smaller race alternator covers) made now that relocates stator into the cover allowing the stater gear to be re-inserted. So ordered one and saves adding width using the standard alternator casing and cutting fairing to accomadate

K2-K6:
Seems like a good way to go as that race type alternator cover is a big marker in replica terms,  and not having to cut the fairing.

The manual data for original states 12volt at 15amp rectifier output,  180 watts baseline as I understand it.

The bike looks fabulous by the way  Phil.

Oddjob:
I thought the later 750s got 200w alternators.

I read the other day the 500K0 was originally supplied with a 200w alt but they stopped doing that about the same time as they changed the crankcase and went with 150w afterwards, not a great decision.

K2-K6:
I think it's how they write it as the above quote is from early 750 manual in which the quote "at 12volt battery voltage" so looks like a baseline/minimum of 180 as most system are going to run above that notional 12volt. 

So pure technical supply is able to be supported at 12volt 15amp  but reality is most likely higher in normal use for "marketing purposes"

K2-K6:
Realized my post wasn't clear as the manual I've got doesn't state the total wattage,  just the data above and noted it's conditional on the battery supply voltage as to the total watts. Effectively it's variable within a range rather than single figure across all operational conditions.

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