re: Honda Rubicon 500 - starting running issues

I'd check the battery. A week battery can cause similar issues. No guarantee but that is an easy, quick check. Depending on age of gas, I'd drain it completely and start fresh. Make sure you getting a good steady flow from the petcock while draining. Next thing I would do is pull the carb, remove bowl, remove jets. Clean jets, reassemble, fresh gas, crank it up.