Greg........Like I said above, make sure your battery is good. Charge or replace. If battery is going bad, you may need to keep on power source while you do this, as you'll be doing a lot of cranking. If you use jumper cables, make sure the cage is turned off/not running. If bike is still turning over, but won't fire.....Lift tank & remove airbox. Spray the snot out of the carb stacks with cleaner or starting fluid, then try starting. I had to repeat this for 5-10 minutes, and was just about to give up.....when she fired & started sputtering. Poured a little gas down the stacks next so she could run long enough to warm up & start normally after I hurriedly attached gas/vacuum lines & restarted again. Once you get her purrin', let her run for awhile so those carbon deposits can burn off the plugs