I changed my WR to YZ timing today, followed all directions to the T, and it won't start. Could my jetting be that far off? I bought this bike used so as far as I know the jetting is stock. While kicking it over, the bike will fire a couple of times but then die again. What do you think? What kind of jetting should I be running in 30-60 degree weather at about 800ft above sea level?