1994 sportsman 400 4×4. I cleaned out the carb, put in a new spark plug, new air filter, fuel filter, replaced the fuel lines.

I start the atv and let it idle for about 5 minutes. When it is in neutral, if i give it max throttle, the engine gets to about 5400 rpm and then seems to stay around that reading. If i keep the throttle pressed, it seems to climb above 5400 up to maybe 55-5600 or so. This might be normal but seems kind of strange.

Idle-max throttle- climbs to 5400 quickly-hangs at 5400 for a few seconds- climbs a few hundred more- wont go any higher.

Is this normal for this machine?

Also from idle rpm of 700, at what rpm should the clutch engage where the atv starts to move from a stop?

Thanks everyone