Xr200r wih no exhaust

Adjust the mixture screw outwards about half a turn at a time to make it richer it is running too lean at the top end

You can definitely ride it without the servo, all 3 of my bikes have the FI lights on as I have aftermarket pipes with the servos disconnected. But I would make sure the servo is open, you'll lose a little low end power, but you won't sacrifice any top end.

axel bearing either is bad or needs grease or not adjusted correctly

check whether you have a blogged exhaust.

Usually either:
1) Pour redex into spark plug hole. Kick start bike with ignition off and leave for a few mins. Then start up and watch the thick black smokey mess come billowing out of the exhaust and run for it as the nieghbours, parents and everyone and his dog complains about the pollution...
2) More likely, sadly, to need a rebore and new piston....

I would take the carb apart running through water shouldn't hurt it

Use SAE 15W40 for bikes from Castrol, BanRay or any motorbike oil brands. You need about 2.3 litre and a new oil filter suitable for your bike. The oil filter normally lives on the front part of you bike just ahead of your exhaust pipies.
Good enough for thumb ups?

Hello if your motorcycle is blowing a lot of smoke and oil from the exhaust and running poorly,sounds like you have worn crankshaft bearings or the main seal is bad and sucking transmission oil.

The bike wont start for a little bit ????????????
What do you mean.Either it starts or it doesn't.
First of all check the fuel pump.Place the kill switch to "off" position and turn on the key.Put your left hand on the pump (it is under the seat and close to the fuel tank I think.Looks like a drum with 2 pipes on one side and wire on the other end) and then press the kill switch to "on" position.The pump should start pumping for a few sec and then it will stop.
What exactly is a "spudder" that you heard from the exhaust? Like an explosion with a flame (backfire)?
When you crank the engine does it feel like having combustion or it turns like there are no pistons inside?

sounds like you got good advice at the shop. it is rideable worst case scenario you will lose second gear completely but these bikes can go without it. just not as fun.