Something I learned tonight By scooteraddict (Read 794 times)

[scooteraddict]

Well I finally broke down and bought a HID light kit to install for my MC250B. When I went to check which wires are for the high and low beams, I found something interesting. With the bike off and key on, the small light above the regular lights read at 12.4, what the battery would be. With the bike running, 15+ volts.

Now I would consider that normal but what I found out is that with the bike running and supplying power to the head lights, I was only getting about 9 volts.

With doing some calculations, with 13.5 volts as the voltage and 35 watts for the lamp, the resistance that the bulb would be 5.285 ohm's. Now if I took the resistance and multiply it with say the 9.6 volts that I was reading, I would only get about 17 watts of light output. No wonder that light are not very bright.

Further along as I was monitoring the voltage, the fan kicked in and found that the voltage to the lights went to 12 volts. Go figure.

Although I didn't get a chance to finish the install, I did test one light and WHAT A DIFFERENCE!

[Bashan]

Interesting....that 15+ kind of concerns me. That would have to be what the charging system is putting out since there's no way to amplify voltage in a scooter. Don't you think that's a little high? Rich

[tvnacman]

Resistance changes with temp .

John