How do you know that this is a 2000?

Did the previos owner run it much? Did he know how to set a super tiger?

How long has the engine been run? Is it broken in? The tigers I have run take at least an hour of running to break in.

What fuel are you using?

What glow plug is in the engine?

What muffler is on the engine - is it the original super tiger muffler? If its an aftermarket muffler most of them do not have enough back pressure to feed fuel into the engine correctly, so as a result you will have trouble setting the carb.

how high is the fuel tank centerline compared to the carb fuel inlet? it needs tobe pretty close to the same height.

Ed