G'day all,

As of yesterday afternoon on the way home from work (didn't do it on the way in) my bike has started popping on decel. It's gone from non-existant to very noticeable in almost every downshift. 
My shifting hasn't changed, it even happens in lower RPMs.

I know it's usually related to tuning, so I'll be running a couple PowerVision basic auto-tunes to see if it helps. Annoying though, I am currently running an untouched tune I got from Fuel Moto USA which has been perfect for a while now.

Anyway the reason I made this post is I have no idea why this would just start happening. I haven't changed any components recently (besides the bars) so having no explanation for it is bothering me. 
Can anybody tell me?

Any info is appreciated! Google hasn't turned up fuck all, or maybe I just suck at Googling...

My advice also...check for exhaust leaks before investigating further!

Blow smoke near the where the pipe connects (near the nuts). You'll soon see if there's a leak if it blows or sucks.

Ah, didn't even think about a leak. Thanks for the advice guys I will definitely be checking that side of things out.

Bonkerz, what do you mean by "Blow smoke near the where the pipe connects (near the nuts). You'll soon see if there's a leak if it blows or sucks." exactly? Like with a smoke or something?

Yup, cigarette is fine. Incense or some such shit if you're not a smoker.

I thought that's what you meant but wasn't sure. Cool as mate that should be easy done.

UPDATE: Turns out the rear cylinder's header nuts had completely come loose and fallen off. The front cylinder's nuts were also finger loose... Those cunts were definitely tight as after I fit the V&H :/

Hey Rod, are you on the crack again?