Idle is changing

[Wiltrek]

My 2007 695 is developing an irratic idle.  It starts fine with choke set, after warmup the idle sometimes drops to about 500 then the bike will stall.  I have tried to adjust the idle bypass screw and it makes no difference.  Where do I go next?  I am looking for ideas, the bike has 30k miles and was just tuned and serviced about 700 miles ago.  This problem started about a month ago and is getting worse

[Dirty Duc]

Did your service include a fuel filter?