Sounds like a Cicada at certain speeds

[Radmod]

Hello, Im hoping someone can help me diagnose a sound coming from my bike that is driving me crazy.

2006 Kawa Nomad 1600 FI
32,000 miles, installed cam chain tensioner extenders from Chucksters Customs a few months ago @ 30,000 miles.

The sound started about a week ago a little over 32,000 miles
It sounds like a cicada at 20 Mph in first gear, shift to second still makes that sound until about 35 mph and if I cruise between 35 and 50 mph there is no sound. It starts again at 50 mph. In those speed ranges it occurs while accelerating, while cruising and while decelerating. One constant is that when I pull in the clutch the sound stops.

The sound seemed to becoming from the front.
I made sure everything was tightened down but the sound still occurred from time to time. Loud enough to be heard over cobra pipes and a full face helmet.

I took off the windshield and lowers to rule out wind noise but the sound still persisted.

Any insight would be much appreciated.