I have an 05 yfz 450. I race, and want to remove the ehadlights. Is it true that the battery will not charge if the headlights are unplugged? I was told that yamaha sells something that once you unplug the lights, you plug the harness into this box and fixes the problems.

I had an 04 yfz 450, and the lights were removed for about 1 year, and have had never had problems. But with my new 05, i want to be sure it will be okay.

so will it kill my battery b/c it wont charge?

 

Headlights won't affect the charging system, unless yamaha did something REALLY f'd up with the wiring on them. The only charging issue I ever heard of on yfz's is when you're racing wide open for an extended period of time, where the charging system can't keep up with the draw put on the battery.