Spark plug

[sprtrx300ex]

What can happen or what noises will I hear from a plug that is not screwed in all the way? (I don't want to overtighten mine)Will the valves be louder etc? knock?

thanks

[Dave400ex]

Just screw the plug in until you can't with your hand anymore, then get the tool and tighten it up. Just go until it's snug.