New owner, new member. Happy to be here with all you fine people. I've been lurking around for a while trying all the suggestions to similar problems...to no avail. I'm really hoping y'all will be able to help me out here. I apologize if this problem has been covered already somewhere but I haven't been able to find it. Recent purchasee of a used 2000 XR650L. The bike came to me desmogged, and that seems to be it mods-wise -- pretty clean. The issue: the bike ran the first day I bought it. It had some trouble starting cold, but after some cranking and sitting in the sun, it started right up and I was able to ride it around for a while. I put some gas in it. Started right back up and I rode some more. I stopped, let it get cold, and it hasn't been able to start since. But wait...there's more. I troubleshot the entire electrical system for continuity and payed attention to resistance. Fine. I tested all of the components and everything is in spec. I replaced the CDI -- it is aftermarket, however. (Anyone have any issues with not OEM CDIs?) I cleaned the carbs and jets (50 pilot and 160 main). Replaced the spark plug. Ensured sufficient charge on the battery. Ensured that there's spark. Boots don't seem to be cracked... I'm now able to get the bike to fire, it runs for about 1 second and dies. I'm able to do this repeatedly. I'm able to give it throttle and the rpms rise as they would in normal operation, but the bike still dies within 1 second. I've ensured there's fuel in the bowl and the fuel is clean (no particulates or things that could clog the jets). It feels as if the bike is starving for fuel but that really doesn't seem to be the case. It seems electrical. I noticed that the bike will run so long as I keep the push start engaged. Soon after releasing the the starter, the bike dies. Could there be bad wiring somewhere in this circuit? Could the relay be bad? ....help preaz.