Since new, my bike has been a bitch to start when it is below 40 degrees out. Several things would help.....like turning the fuel off and running the carb dry whenever I get home....or tipping the bike over on its side to spill some gas over into the carb. But they are a pain to do. So I put a simple low-$$ fix which is a snap to install and flawless in operations. I got a jet-ski primer kit ($15) and installed it on the bike. When it is cold out, I prime it with a pull/push on the primer knob, put the choke on, and hit the starter. It cranks up immediatly every time. Installing it was easy. I cut the fuel line about 2 inches below the fuel cutoff valve. I then inserted a "T" connector with a 1/8" connector in the middle. Be sure to use clamps, as you do not want it to come loose. I then connected up a 4-inch section of fuel line which came with the primer and attached it to the 1/8" T. I zip-tied the primer on the mount for the idle-adjust knob. I then drilled a small hole into the top of the plastic air-intake hose imediatly before the carb. I glued on a 1/8" fitting into the hole and attached a hose to it. I ran the hose under the seat and plugged it into the outlet of the primer Done! Cheers!