I have an 08 with all the free mods, JD jet kit (can't remember what jetting of the top of my head), full 09 yz system. Fires up cold with the e start no problem and hot with the lever every time after a few second. Cold: turn on gas, engage choke, twist the throttle 3-4 times to squirt some juice in there, stab the button....boooom she fires every time. Never had a single problem. Hot: grab the hot start lever, stab the button....booom she fires after first crank. The only time I ever used the kicker was when my battery died. Maybe kicked the bike 10 times then replaced the battery. People who say she wont start with the button at cold do not have their bike jetted or live at the north pole.