250-500cc wr 300 wont start with headlamp on

help, i have a trailtech headlamp switch on my 2011 300 (and on my last husky too) and just today i found that the bike is nearly impossible to start with the headlamp switch in the on position. shut the headlamp off and the bike fires in one kick! start the bike and then switch on the headlamp it works fine.any suggestion?

Sounds like you answered your own question. The headlamp must be sucking down any juice created while kicking, making starting impossible.

start with the headlight in off position

Look for a short or a partial short between the switch and the headlamp.

I have always wondered if the headlamp itself is sufficient enough of a drain to make starting harder... Makes me want to put a switch on mine so I can turn it off except for situations when I "need" it.

apparently it is, i had the small bulb originally wired up with no problem but when i hooked up the main lamp it draws to much current during starting

Interesting! When you disconnect the big bulb, does it start fine again?

My WR has the headlight installed, connected to the main bulb (not sure if it's the hi or lo beam). I can start it, but sometimes it's a pain. I wonder, if I disconnected the headlight, would it start easier?

try it and let me know, unless somehow the switch is causing a draw , maybe i should try to tap the switch into the ground and not the power lead

I had mine wired direct with no switch , 1 kick starter

Anybody have a wiring diagram for one of these in front of them? I don't know if the lighting is powered off the same part of the stator as the ignition. Some bikes have a separate winding for lights and power, in which case it wouldn't case starting problems, since you're not drawing power from the same place. On the other hand, if it pulls power from the same source, it could be an issue, maybe...

My KDX didn't care at all if the lights were on or off for starting...

Brad, if you put the switch on the ground side of the light, it just means that the light and the wiring to/from it will always be hot. I figure that's even more risk for a short, having hot wires behind the light all the time... The way you have it should be fine.

If you manually unplug the wires from the back of the light, does the problem go away?

NOW CHECK THIS OUT, bike is now ice cold, i clicked the lamp switch on,gave it a kick and it fired right up ?!?!? maybe the ignition and lighting wires are very close when the stator heats up?