carb leaking... need a new cv shaft drivers rear

Welp the work never ends with this rhino..... I noticed the seal at the bowl was seeping a bit so i gotta pull the carb off and replace the oring I guess. Does anyone know where i can get just the O-ring i don't know alot about carbs so I don't really wanna rebuild everything it seems to run pretty sweet right now. Also does anyone have a stock 06 drivers side rear complete cv shaft they wanna sell??? in good condition of course.

i would also like to change out the shitty bowl screws to allens or bolt style anyone know the size for a stock carb...

is this for a stock 06 660? that would be a 42 mm Mikuni BSR
you should be able to cross reference from parts fiche for size and get stainless allen head capscrews at your local hardware store. while you're in there check for a carb rebuild kit. they aren't that much money and you'll have spares.
i'm sure james could hook you up with a rebuild kit... 
might as well take it apart and replace any bad parts if needed. if the float bowl has a green coloring (from ethanol) you'll want to clean it anyway.

I don't know shit about carbs I didnt wanna mess anything up while i was poking around in there... i dunno..

Everytime I have to read about needle clips and stuff I get a nose bleed..

Anyhow how much is a rebuild kit with some allen head screws James??

Ok so I yanked the carb.. I was looking at the carb schematic and it has 2 jet main listed 1 is a 145 and 1 is a 60? I can't actually tell from the image where the 60 is going? Also probably a dumb question I know the throttle cable opens the air flap thing but what moves the throttle valve? I noticed its spring loaded but when I push the gas it doesn't seem to move only the air flapper behind it? O and my float bowl o-ring has gone to shit as I suspected inside of carb was actually pretty clean.

the 145 is the main jet and it goes inside the long perforated tube.
the other jet screws into the body of the carb where you took it out.
the throttle valve won't move until the vacuum from the running engine "pulls" it up.
if an o-ring is all you need you can buy that separately, along with replacement screws.

Thank you that answered my question.