I just bought a 2002 eiger 400 4x4 manual project bike for a father son project. I am new to 4-wheelers also. I pulled the carb off due to a stuck open float. Also noticed that the choke needle is stuck in. Got that soaking now. Question I have is on the vacuum lines. Do not know where they go. the one in the middle on the intake to the engine and the one on the upper left side. Any help would be greatly appreciated. Nothing was hooked up when I got the bike

 

The large hose is the fuel line; the smaller is a vacuum line to the fuel shut-off valve. The hoses and nipples are different sizes, so just connect the hose to the matching size nipple.

It is HIGHLY likely that if the choke & float were sticking, the carb has clogged passages and gunk/dirt elsewhere.

As long as you already have the carb off the quad, I would suggest that you completely disassemble it, and clean each port/passage, needle, etc. You'll avoid a lot of future aggravation by doing it now.

Eiger carbs are very simple, and a complete disassemble/cleaning/reassembly is a quick job--not a lot of parts to lose, or lose track of.

You can find OEM schematics/line drawings and parts for your quad at BikeBandit.com. Just print the blow-up line drawing, and have it next to the carb as you disassemble & reassemble it.

Also suggest adjusting the idle mixture. To meet emission requirements, quads come from the factory with the idle mixture set very lean. Richen the mixture, and the quad will start easier, have smoother throttle response, and warm-up much quicker--Eigers are great quads, but definitely cold blooded.

To adjust the idle mixture:
1) Remove the plastic (or aluminum) plug over the idle mixture screw (located at the very bottom of the carb). Use a 1/8" drill bit
and carefully make a hole in the plug. The mixture screw is located directly below the plug, so drill slowly, lightly, and pull back
as soon as the drill bit pierces the plug.
2) Insert a sheet metal screw and pull the plug off.
3) Lightly turn the mixture screw all the way in, then back it out 2.5 times.

Adjusting the idle mixture made a huge difference in my King Quad 400 (an Eiger with updated body plastic).