Hi guys,need your help please.bike runs fine,recently been making a small tick tick sound came from engine.not good,thought piston slap,bearings,no.touched power valve at bottom with my finger,could feel it was coming from there,as piston moves up and dowm.you can feel it makes contact with power valve,,not good.so,my power valves has never been set(factory paint still on bolts and nuts)so I set the valves of bottom cylinder and it didn't touch anymore,BUT now,my bottom cylinder makes more power than the top one,do I nEed to set top cylinder power valve aswell?you can feel the one exhaust pushes out more compression and smoke than other,I urgently need your help.I want to know:if top and bottom cylinders powervalves are set differently,will the one cylinder put out more power than other one?can powervalve touch piston,and what can happen if it touches.I will apreciate all replies,please need your help