my honda 300 wont start its got gas and a spark and rolls over but wont start do you no y

 

Replace the plug it may be fouled and have a weak spark. If you have that and gas, check compression. If that's good could be timing. An engine only need spark, fuel and compression (and correct timing of all 3) to run.

 

This is a dumb answer but check and see if the gas is turned on and the ignition swith is in the on position and also check to see if the key is turned on!

You never know!