leaking or hissing noise from starter

I just had my sprag clutch / starter clutch clip replaced recently. Ive been using decomp lever since to maybe help prevent breakage in future.

Took to track and also did a couple short rides around my neighboorhood, everything good.
Then today i bled out my clutch because air in system.
When pressing e-start, the engine makes a hissing sound that can be heard during and after you release estart button.
Sound is present with or without decomp lever pulled and hasn't made this noise before.

I have no symptoms. bike starts good and runs decent (haven't taken been pounding on the throttle or anything, since track). Sounds normal when engine running too.

it sounds like coming from starter or inside case but def not airbox or exhaust.
Anyone know what this might be?

Here is vid of noise, you can hear it when i let off starter.

View: https://youtu.be/gq0mxK64MWI


Bike is sm510r 07

i have that exact sound aswell and mine is pretty tricky to start but runs fine