Still getting a slight backfire on R3

When I first got my 06 Classic R3 last year it didnt do it, but now every once in a while it will kinda "poochick" (backfire sound) sometimes the engine will hesitate for a split second. This is at a usually slow or medium constant speed, never acell or decellerating. The dealer checked the tune. all ok. What could cause this?

Off the subject how often do you change your oil? I use the Triumph Sythethic. Changed it at 500 mi, have 3000 now. Dealer says wait.

My Rocket recently began to backfire, and it rapidly got worse - I thought it as dirty fue, but it turned out to be a faulty o-ring at the manifold. Ask your dealer about this possibility.
Cheers,
vikei

ECU R3

I'll ask about that, I still get the popping on decell, but thats different than the backfire