The is no power to the ignition dash lights head lights, winch but will pull start

First check the positive cable at battery and at the starter relay that the positive wire usually goes to. Somewhere right around there should be a fuse - that fuse goes out and your ignition system is kaput - pull start or nothing. If nothing at all happens - more than likely your fuse or what...yamaha had them on a lot of the 90s - 00s bikes - it was called a starter cut-off relay - it was a small black box wired in right by the postive cable where it goes to starter relay. Also check your ground cable at battery and where it goes to engine, usually. if all that checks out - let me know your year, make & model and if I have the tech info I can tell you where to start and how to troubleshoot - all the best