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Posted by BERNICE JOHNSON on May 1, 2007, 7:42 pm
The regulator output to charge a 12 Volt batter in a car or motorcycle
should be 13.8 Vdc. 30 minutes after charging it measure the open circuit
voltage. It shoud be 12.8 V or better, if not the batter is not fully
charged. Battery Tenders are not battery chargers they just maintain a fully
charged state. If your battery will not hold a charge equal to or greater
then 12.8 volts after charging over night then the battery is on it's last
legs.
> wrote:
>
> |>On Mon, 26 Feb 2007 22:51:16 -0800, ©rkba@ca.rkba.cid wrote:
> |>
> |>>On Mon, 26 Feb 2007 18:16:13 GMT, Dennis Lee Bieber
> |>>wrote:
> |>>
> |>>
> |>> So the magneto does recharge, but usually not enough...it should read
> |>>some 12.8v as a full charge...12.4v means recharge, and 12v means a new
> battery.
> |>Actually a fully charged battery should be 13.2 volts if it is lead
> |>acid. (Many maintenance free batteries are actually lead-calcium, and
> |>run a bit higher). As a result, the charging voltage really needs to
> |>get in the 14-15v range to provide effective charging.
>
>
> Your right on all that, I have tried them *batteries* at up to 15volts,
> and that is VRLA called Gel,, but the Battery manual states Wet Storage
> which is
> SLA Lead Acid....
>
> The manual cautions on overcharging above 12.8v, but they gotta be
> kidding ...............then they state in the specs that 12.8v is the
> minimum
> open circuit voltage as per all the other normal batteries...
>
> |>Magneto provides spark, not charge. There should be an alternator,
> |>most motorcycles these days don't use magnetto's, and haven't for a
> |>long time. The main advantage of magnetto ignition is you don't need a
> |>battery, EVER....
>
> The Charging System on the Majesty yp400t
> -------------------------------------------
> Charging System:
> System Type A.C. Magneto
>
> Model F5RU (MORIC)
>
> Nominal Output 14V/27.5 A at 5,000 r/min
>
> Stator Coil resistance/color 0.184 ~ 0.276 ohms at 20deg. C
> (68degF)/
> White-White
>
>
> -----------------------------------------
>
> Rectifier / Regulator
> Regulator Type Semiconductor,Short-Circuit type
>
> Model SH678-11 (Shindegen)
>
> No-Load regulated Voltage 14.1 ` 14.9V
>
> Rectifier Capacity 22A
>
> Withstand Voltage 200V
>
> -----------------------------------------------------
>
> So the A.C Magneto is another word for Genetator/Alternator/Stator
> Coil....we always get these terms mixed up because the manufacturer does..
>
> Bob
>
> |>>
> |>> If your going down to 9.8v overnight, the battery is toast and should
> be
> |>>replaced, using the old battery as a Computer UPS backup battery were
> it will
> |>>stay charged all the time..
> |>>
> |>>|> Biggest concern now is that my stop&go commute spends too much time
> |>>|>not charging (system doesn't put out enough voltage to charge until
> |>>|>2000+ RPM). I've started taking the freeway route just to avoid
> idling.
> |>>
> |>>
> |>> That "tick, tick, tick" or more like a "ratchet" sound, is when the
> |>>battery is too low and usually won't start at that point.....the sound
> itself is
> |>>some starter relay knock on newer bikes.
> |>
> |>The starter power even on a 300cc engine is about 30 amps, much more
> |>for larger engines. The wire run from the battery to the switch to the
> |>starter would be too long, and require exceptionally heavy wire (6
> |>gauge or so). So you can keep the leads from the battery to the
> |>starter very short by putting a starter relay (technically, contactor)
> |>right next to the starter, and then the start switch only has to
> |>handle the current to operate the relay, a faction of an amp. However
> |>if the voltage drops to low, it may not be enough to hold the
> |>contactor in, so you hear it clicking. You close the starter switch,
> |>the relay closes, the current draw from the starter however causes the
> |>voltage to go to low to hold the contactor in, and it drops out,
> |>disconnecting the starter, with the starter load gone, the voltage
> |>comes back up, the contactor closes again.. repeat ad nauseum.....
> |>> The single press of the starter switch "ratchet" sound from the
> starter
> |>>relay is much different from the starter relay "one click" in older
> bikes,
> |>>which was difficult to notice at each press of the starter switch.
| 
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