Just had carbs cleaned bike has 33000 miles ,new battery,new plugs,all fluids changed,new fuel pump, it starts up fine idles great runs for 15 mins then it makes the brdddddddd sound then shuts down as if plugs are being flooded but when plugs are checked 1 and 4 dry and 2 and 3 has a little gas on them let the bike sit for 2 hours and it repeats the same process , also checked float bowls they appear to be fine also I´m stumped please help.