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12/9/2018
Location
IE
Hi, I’m looking at buying a 2011 ktm xc 150. I know that the bike has a stator, which gives out AC current. I’m wondering will I be able to power a headlight and rear light off this or will I have to wire it to a regulator and have a battery like this video... https://m.youtube.com/watch?v=IwzEqsiKYyk
Has anyone done this? Can anyone help? Is it possible to power the light straight from the bike? Thanks!
Has anyone done this? Can anyone help? Is it possible to power the light straight from the bike? Thanks!
Your alternating current coming out your stator goes to the regulator, 12v DC will come out to battery. Now when the bike is started, the battery will charge. You need to ground the battery to the chassis.
From here you can run a positive 12v to anything. So in your case a simple headlight. Note any accessories added need to be fused or have a circuit breaker. With just one accessory, I personally would just add a small inline fuse you can access easy.
So a positive 12v wire runs to your switch, then from the switch to the light, the light then needs another wire ran back to the ground on the battery or another ground point like the coil mount that is near by. Thats it other than making sure, the switch/wires you use can handle the amps the light pulls, if not you will need to ad a relay. If you need to do that, you basically add the relay in between the switch and light.
Note: If the light does not provide a amp rating, It more than likely will provide the wattage. Watts divided by volts = amps.
60 Watts / 12v = 5 amps
The Shop
This was the setup I used on my son's '04 KDX200 and it was flawless. He had an 85 watt stator that we used to power a large 8" 60 watt led off road light along with the tail light. We plan to do the same to his XR400. As to the video you attached, yes the light does not operate at full power at idle, but it takes very little revs for it to be at full brightness.....basically as you ride the bike you virtually cannot ride it at low enough revs to get anything but full brightness out of the light. That was our experience anyway.
If you just want to give it a go and see what happens you could go with a cheap tail light such as this https://www.ebay.com/itm/Motorcycle-Tail-Light-Brake-Run-Fender-Red-LED… . Maybe it will last long enough for you. Put a switch in your wiring so you are not running it at times when you don't need it and it might be enough for you. I just realized you're in Ireland? So maybe some of my references are not useable to you locally there, but you will find the proper pieces in your ebay there. The ac regulator you linked to will not handle enough power. It only showed about 24 watts. Do a search for a universal motorcycle ac regulator and you'll find something similar to this https://www.ebay.com/itm/Trail-Tech-Universal-ATV-Motorcycle-Ac-Voltage…
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