I have a 06 yfz450 I am not eating spark all grounds are made that I know of the only one I know of is to the clutch cable mount all wires are hooked up motor is turning over just no spark the coil is good still checked wires for power I have power what is wrong

 

About the only way to repair a no spark issue is to purchase the manual and troubleshoot the electrical system....could be many different things that causes no spark. Tradebit.com sells the downloads for $5....you will need....

 

Check Battery first load test it, it needs to be good Check kill switch, you can use a wire to bypass it to see if it is that swap spark plug, take all connectors apart and spray contact cleaner in them and put them back together. Take a multimeter and check if the coil is getting power on the 12 volt side. If it is, then you have a bad spark plug, wire, or coil. If you don't work your way back and check all the wires one could have a break inside set multimeter to ohms and check each wire from one end to the other using your probes put negative on one end and positive on the other your meter should read zero or close some will beep. If you have a bad wire your meter will not read anything and not beep.