Evolved Components Plug and Play LED Headlight Kit. Fits most 7/8” Handlebars. Kits come complete with waterproof wiring harness, on/off switch, in-line fuse, and all hardware needed for installation. Dual row light bar with over 4000 Lumens of light output.

These will fit almost any pitbike without a battery - but have a lighting stator - typically this is a yellow wire coming out of the stator.  The 2002-2009 KLX110/DRZ110 have this and these light bars work great on them.   Many aftermarket companies make lighting stators for most pitbikes like the CRF50’s, XR70’s, Etc if yours if not equipped with one. 

YouTube video of installation here - https://www.youtube.com/watch?v=WOG_tLY7Omw&t=913s

Comes with 1 year warranty from Evolved Components