Cam chain can be too tight and make noise like that. When I installed a manual cam chain tension adjuster on my Ninja, I was learning, and one thing I did was ride the bike around slowly in a parking lot with no helmet so I could hear the engine noises. And in fact yes, when the chain was set too tightly, I could absolutely hear a whine. If you haven't changed your CCT for an aftermarket manual one, you could try inspecting it and just re-setting the tension. It's rather simple and doesn't require taking the motor apart or anything. If you reset the CCT and it's still doing it, would probably be worth it to get a manual CCT and never have this issue ever again.
Worth looking at if the sound is still illusive. The stator wear there doesn't look good but isn't terrible. Make sure there's no debris stuck to the magnets in there, but even that wouldn't cause an "intermittent whining" sound.
Hope this helps.
-Mike
Worth looking at if the sound is still illusive. The stator wear there doesn't look good but isn't terrible. Make sure there's no debris stuck to the magnets in there, but even that wouldn't cause an "intermittent whining" sound.
Hope this helps.
-Mike
