Something I learned tonight By scooteraddict (Read 911 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!

[justbuggin2]

hose electrons are funny that way

[sinister008]

That IS pretty interesting... ;D

I'm currently working on an idle adjustment/carb issue, but I plan to replace my headlamps as soon as time and money allow.
Especially since the left side headlamp doesn't work on hi OR low beam.

Just out of curiosity, which kit did you choose?
damin69 posted an eBay link to the kit he got, but it's now too old to be of use.

[scooteraddict]

The kit that I purchased was from a web sit called .ddmtuning.com" rel="nofollow" target="_blank">.ddmtuning.com. I purchased one for a car since I needed the 9003/H4 hi/low kit. It cost about $80 and a slow boat from China. It too nearly two weeks to get here. Nice and everything. It comes with a relay wire harness that you would need for the hi/low to work. The only thing I need to do is lengthen the positive and negative wires and relocate the fuse.

[JR]

On the 250B the little lights you are refering to run directly off of the battery and benifit from the scooter running due to the charge from the regulator. The lights feed off of the black wire from the key switch which is fed by the red wire from the battery which also gets the charge from the regulator.

The headlights though feed dirtectly from the regulator and the circuit ties in right before the blocking diode. The lights vary in voltage reading because the output of the Regulator varies with RPM changes and the reason it came up when the fan came on is because the fan circuit runs off of the same circuit as the lights and the black wire on this 6-pin regulator reads voltage need or demand with the fan on which draws 2.75 amps the demand is more thus the regulator puts out more, that simple.

Also I don't get your watts calcualtions?

watts = volts X amps

If your voltage went back up to 12 volts with the fan running and the bulbs are 35W then

35W div by 12 = 2.92 amps amps = watts div by volts

2.92 amps X 12v = 34.9W

Also I do presume you are runnijg this HID system through a relay directly from the battery? The headlight switch on these scooters will not handle the amp load of a HID system.

JR

[yoster]

Here's the kit that both Damin69 and I purchased:

.ebay.com/itm/Hi-Lo-Bi-Xenon-Dual-Beam-HID-Kit-6000K-H4-9003-9007-H13-/250887697957?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a6a127625" rel="nofollow" target="_blank">.ebay.com/itm/Hi-Lo-Bi-Xenon-Dual-Beam-HID-Kit-6000K-H4-9003-9007-H13-/250887697957?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a6a127625