650 vstar has set for a while if you leave the choke out it will idle but if you try to give it gas it dies if you push the choke in it dies drained tank put fresh gas in and sea foam didnt fix it the bike is a 2005

I have a 04 650 classic that was doing the same thing you have to take the tank off two 12 mm. bolts one at the choke the other on the other side take the three allen screws out the speed gage pull up look under and you will see a brass collered speed cable nut its only hand tightened undo it and the two plugs lift tank off and you will see the carbs and the fule filter there are four screws on each carb dont strip them apply inward pressure and remove them the jets are there flat head narrow one unsrews cluan it so does the wide one its two in one remove the float and needle valve and clean also remove small + screw where the needle valve goes and pull brass retainer out and clean the screen do one carb at a time so you can use the other for refrence.

Sounds like you need to clean carbs or throttle bodies which ever you have.