I have had my 2004 for 2 years now. It's a low mileage bike and has run flawlessly until now. I rode it yesterday for the first time in about two weeks and it backfired on deceleration and will not idle at all it just dies. I always run no ethanol premium and try not to let it sit for more than 2-3 weeks. I assume it's a fuel problem but don't know where to start as far as trying to fix it. Is there an easy way to drain the fuel tank and carbs?