Ok so my spark plugs blows out the engine when WOT and my pedal chain broke so I need to get a new pedal chain how can I keep spark plug from poppin out and my motor scares me when I WOT it screams like its crazy screaming when I get off the bike im shaking. Is WOT supposed to sound scary? and my back tire is kinda loose how do I tighten it like its loose on the rod not the outer nuts that you screw the tire on. Im scared one day im going to wipeout and break some bones, But I need the speed its so fun.