Is the choke on your ATV acting up or broken? This is a direct replacement pull choke starter knob that fits a bunch of popular 400cc quads. We're talking Arctic Cat 400 DVX (2004-2008), Kawasaki KFX400 (2003-2006), and Suzuki Quadsport/LTZ400 Z400 models (2003-2008).
It's a complete little assembly. You just remove your old one from the carburetor (don't forget to save the o-ring!), pop this new one on, and you're good to go. A handy feature is that it locks in the 'on' position, so you don't have to hold it while you're trying to start the engine.
Quick note: On some 2005-2008 models, you might need to shave down the knob a tiny bit if it touches the TPS sensor. Comes as one piece, ready to install. Get your quad starting smooth again.