hey Jr, welcome to the forum
vstar 1100 is a great bike. It sounds like the typical over-the-winter storage problem that we see every spring. People park their bikes in the garage late in the fall and never know when that was their last ride before winter, and the bike never gets prepped for storage.
The most important thing to do with a motorcycle, esp if you are running 10% ethanol gas, which is common everywhere in the US, is to put a fuel stabilizer in the tank and then fill the tank up full. This will keep the ethanol from breaking down over the winter into something between goo and jello, and by filling the tank it also prevents the tank from rusting.
There are a couple things you can use for this, a product called Stabil, and one called SeaFoam. You can get both at Walmart.
If the bike has ethanol free gas its not so important if the bike will only be stored for a few months.
So lets assume that did not happen with your bike. First thing I would do is drain the tank, because once ethanol fuel has separated you cannot restore it to its former state - its too late for a fuel stabilizer now. What you do with that couple gallons of fuel is up to you and your creativity. I would not put it in one of my cars.
You might be able to clean out the carbs with SeaFoam - it is also designed to be a carb and injector cleaner. You put 1 ounce for each gallon of fuel, so in your case I think its 5 ounces of Seafoam and 5 gallons of gas. More is not better - dont pour the whole 16 ounce bottle in the tank, dont try to run pure seafoam through the carbs. The only people I have heard who had problems with Seafoam are people who did not follow the directions on the bottle.
Since the bike will start and run you have about a 50:50 chance the fuel cleaner will get pulled thru all the jets and will flush out the float bowl, and that might be all you need. Sometimes it clears right up in a 5 mile run - sometimes you have to run the whole tank thru till the bike it back to normal.
If the bike would not start or run at all, you would not get off so easy, because once the jets or float bowls are plugged solid with jello like fuel, there is no way to get the fuel additive flowing thru them. In that case you would have no choice but to pull the carbs off and clean them. Also if you run a whole tank with the 5 ounces of seaFoam, and it still backfires and wont idle correctly , then you have a couple of the smaller passages plugged and you will need to clean the carbs by pulling them.
Hope for the best: $10 on the fluids shelf at Walmart - let us know how it works.
If you search on Seafoam on this forum you will find many people that had the same problem, and SeaFoam was the cure.
BTW, the other thing you need to do to prepare a bike for storage, is to disconnect the battery lead on one side, and either put a battery tender on it to keep it charged over the winter, or check the voltage once a month, and if its below 12V hit it with a battery charger to bring it back up over 12.8V.
Last edited by KCW; 08-04-2018 at 07:47 PM.