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Reducing generator demand on K75

G

GREGFUESS

Guest
i am trying to come up with ways to conserve power on the 1995 K75 so that heated clothes, grips and fog/conspictuity lamps can be used. I have installed an on-board voltage meter so that I can tell how high the clothes can be cranked up before overloading the generator.

The most obvious (to me, please correct me if I am wrong) power savings would be head and tail lamps, as well as fog/conspicuity lights since these are consuming power all the time the bike is running.

Fog Lamps - ordered some LEDs http://cgi.ebay.com/ebaymotors/2-Car-H3-5050-SMD-13-LED-Fog-Head-White-Light-Bulb-Lamp-/350416517512?pt=Motors_Car_Truck_Parts_Accessories&hash=item519673b988 and will report on their performance when they come in. At $5 each including shipping, I can't see how this could be a mistake.

Head Lamps - I hesitate to go this route, as the reflectors would seem to be an issue, but LEDs would be the ultimate. These are a little more pricey, too. But any comments on these would be appreciated. http://cgi.ebay.com/ebaymotors/2x-1...r_Truck_Parts_Accessories&hash=item19c1658768. Alternatively, 35W HIDs would be Plan B, though they are more expensive that the LEDs, they would require no reflector mess and are a proven product.

Tail lights - I am going to try an LED tail light that messed with the can bus on the K12S. I will report with manufacturer, etc if it works.

Any others areas to think about? Turn signals seem a bit of overkill, since they are rarely on, and then only intermittently. Since this bike has run-n-lites (uses the turn indicators as running lights and turn indicators) on the front and rear, LEDs may be ok, but I am not sure about what would happen with the signals and run-n-lites.

There has been talk here about replacing the generator with a larger capacity one. Is this necessary for for fog lamps and heated jacket & pants liners? Or can I get away with conservation?

All comments appreciated.
 
If I remember right, my 1995 K-75 had a 740Watt alternator. It was one of the more powerful outputs of most any BMW of that vintage. I had no problem running heated grips, heated clothing, auxiliary lights, and all the usual head and tail lights as well as the running lights in both the front and rear turn signals.
 
If I remember right, my 1995 K-75 had a 740Watt alternator. It was one of the more powerful outputs of most any BMW of that vintage. I had no problem running heated grips, heated clothing, auxiliary lights, and all the usual head and tail lights as well as the running lights in both the front and rear turn signals.

Yeah, my '95 has a 50 watt alternator. 14V x 50A = 700 watts
 
Greg, I have to agree with the folks above. You will have no trouble running all your electric heated gear and your normal bike load. The system has plenty of head room power wise. (all that spare power helps run the ABS system) The only bikes in question would be one of the older airheads with a 280 watt alternator. Now there is an issue, but not yours. Put your gear on and find a cold day to ride with no worries. beech
 
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