engine surging/hunting

[Frosties]

not sure how long its been doing it i think quite some time now but it wasnt noticeable as much untill i put my new exhaust on and i can hear it.


idle at 1200rpm but bounce up and down about 300rpm or so, not eratic but every few seconds itll go up then settle.. when riding along at a constant throttle i can just about feel it but can hear it in the exhaust tone.


ideas?

Could be the onset of involuntary Ticks  :lol