Newbie here. Just bought a 2003 klx 400. Love all the info on here. Great site. My question is after i got it home i noticed a second choke knob. The factory choke is all good. Zip tied to the front of the carb is a machanical choke piece I'm asumming off of another bike of some sort. It has a vent hose coming off of that going into the vent nipple on the rear of the cylinder head. It pulls in and out just like a choke. A buddy of mine and me have never seen something like this. This might sound stupid but could it be some sort of hot start? Ican try to post pictures later if anyone wants to see. Thanks for any info.