downshifting

Hello all, The bolt for my gear shifter recently fell off during a ride. So I have just re-bolted it all up and put a small amount of Blue Thread locker on the bolt to stop it from loosening back up during another ride. Though now the gear shifter seems to be getting stuck and I've got to...

I thought I saw somewhere on here that cleaning the throttle body might solve the issue of the bike cutting out while downshifting(?). I only experienced it downshifting to first. I'm not sure if the issue would occur in other gears. Is there merit to taking the throttle body off and cleaning it...