Honda TRX450R Carb Clean 

Generally its pretty empty. There will be a little residual gas left in the bowl. I use that method if i know the bike will sit a while. The better method is to use the bowl drain screw to empty the bowl. Good luck!

The 450 def rips hard. The last couple years of 400's were faster than mine. either way they are hella fun!

I do not recall what those were. If you google it its pretty easy to find. Its a good idea to make sure you jet it for your elevation. That will be different. I live in Phoenix area so it would be different jetting for Denver, for instance. Good luck

I am not certain of the sizes. They are the OE jets that came in the carb for sale here in AZ.

I'm afraid not. The jets can be different only based on the elevation where the bike was originally sold. Generally there would only be 2 offerings from the manufacturer.

No, as long as the Petcock to the tank is closed there's no need to empty it.

Its My neighbors Quad he bought them of Amazon, LED's. that's all i know about them, Sorry!

I did not end up messing with the Air/Fuel adjustment. The common setting is between 1/2 & 2 turns out from bottom.