Standard exhaust - Burble and pop at idle

Just a quick one, recently purchased a full fat cup 200 and I have noticed it burbles and pops in about 5 second bursts at idle quite a bit. It isn't loud at all (sounds quite good though) but I'm just a bit concerned that the root of this could be a fuel flow/combustion issue. Anyone else experienced this?

Cheers.
 
They do tend to 'chuff' at idle. It's just a lumpy idle, perfectly normal. Although if it's really exaggerated it could be an injector issue.