I have an old motobecane cady, but it do'snt give me a good spark. I have start the moto before ( and it was fast ! ), but it did'nt run more than 5 minutes and die. My carb is clean and nice, gas go the motor haed. But my spark is more yellow than bright blue ( at least I have one ) , what this could be? the coil? How to be sure it's the coil?
Thank you in advance