Post subject: CM400 newbie charging system question
Posted: Thu Nov 25, 2010 2:14 am
Joined: Wed Sep 02, 2009 5:12 am Posts: 6208 Location: Malmo, Sweden
Motorcycle(s): 1966 CB450 K0 Black Bomber, 1968 CB450 K1, 1969 CB450 K2, 1975 CB450 K5
I have no experience at all of the CM/CB 400. Is the charging system of the more modern and stronger 3 phase type on these bikes like on the CB550 four? Would it be possible to ad electric acecssories like handlebar warmers?
Post subject: Re: CM400 newbie charging system question
Posted: Thu Nov 25, 2010 7:08 pm
Joined: Thu Sep 25, 2008 7:40 am Posts: 15388 Location: Stephen Lohmeyer,3839 Sun Valley Lane, Roanoke, Virginia 24014 540-525-5199Sixtysixsprint@aol.com
Motorcycle(s): a few....
Ok...Let's assume the entire 5 amp charging current is available...Since W = A x V, and we have 12V, that gives a maximum of 60W available... Minus flow/resistance losses, let's call it 55W to be safe.......But you'll have to keep it at 5000 RPM or above to maintain or exceed that... (just keep the net charging at zero)... Since electrical generation is a logarithmic factor of the rotor speed, the 1100 RPM idle would only produce about 38% of that....... You are looking for a 21W max accessory......which is about a taillight bulb in heating ability.......
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