Ok rubber flapper over motor to reduce heat emitted to rider? Equals engine runs hotter?should I remove
.

The primary function is heat shield.

I removed mine to save weight and allow easier access for maintenance. Now I hear all the engine noises. Wish I had left it on.

I say lose it. I can't tell any dif with or without. You will have to remove the throttle bodies if you want to remove the condom undamaged but if you don't mind mutilating it, just cut the pieces that pass between the bores with a snipper. You could prolly buy a used one in perfect shape for cheap off of Ebay.

HEAT INSULATOR RUBBER SHIELD

While your at it, might as well remove these:
PAIR

HEAT SHIELD WINGS

HOT WIND COVERS

SEAT LOCK COVER

Remove the helmet lock on the LH side too.

Take off mirrors. Install mirror blocks.

The battery tray doesn't do anything but hold the battery so ou could remove that along with the guide. Secure the battery with zip ties somehow.

Remove the LH side subframe and tail subframe. Tutorial in progress. I haven't tested this yet but I think it's okay if you aren't bottoming out shocks ever.

Now I hear all the engine noises. Wish I had left it on.

Install loud exhaust.

Boot acts as a noise 1)emission cover.
Boot acts as a 2)barrier to the ram so the air remains somewhat cold and condensed-wink-wink.
The aluminum hoodie over ram under the tank is so the tank's 3)gas remains cooler and condensed.

Hi-performance all thought out for you w/accssories.

"over motor to reduce heat emitted to rider?"...I don't think so.

Hub is correct.