If you don't see the leak in the description below,chances are your flange is OK and you have other issues.
Even if your flange does not fall into the bad part #,or year described in the TSB,it does not mean the flange is OK.If you see the leak,the flange is broken no matter what.
You need a good battery operated flashlight.
With the gas tank at or below a half tank,lift the seat up and remove the filler cap on the gas tank.Put transmission in neutral and start the engine.BE SAFE! While the engine is running,use the light to look into the tank.If you see a spray of gasoline,the flange fitting where it is pressed in is broken,or coming out.
There is a TSB on this flange.Have a dealer run the part # ,(not the VIN), stamped on the flange to see if it falls into the TSB category of failed components.If it does fall into the bad part # category,Harley will usually pay the dealer,under the provisions of factory warranty to replace the flange.Most of the time the dealers are unaware of this,so the best way to handle this parts replacement is to just have the number run at the dealer,then you call customer service for the replacement authorization.
Remember,a TSB is information only.A TSB is not a Recall.TSB repairs are typically covered under the provisions of the factory warranty only when the vehicle is still within the parameters of the advertised factory warranty.
Now,some people only get the part replaced under the provisions of warranty,they pay the labor,then again,some get the whole job done at Harleys expense.The reason for this is simple,and you just have to understand that Goodwill money is not readily available 24-7.Dealers w a high CSI score get the allotted moneys first and dealers w a low score get sloppy seconds.It might not be fair in your eyes as a vehicle owner,but tough shit,this is the way the system works!
If for some reason you cannot get Harley to foot the bill for the replacement flange,there was a TSB issued,before the replace part was available,on how to repair the flange by using an 8th inch NPT tap and fitting.I do not have either TSB at my disposal,but if you search hard enough on 1130,or V-Mod.com's forum,you will find them both.