helo to everyone.i am new member of this forum,also a new and prioud owner of kx500.i was reading many topics about kx500,but i still have some questiones.I have problem with my cylinder it has marks so i have to drill it and put a new shirt in it.I need to know wich tolerance has to be betwhen cylinder and piston,the piston that i have plan to buy is an original from kawasaki .and how much workable hours i have to drive it in not full power after i put new piston.i prishiet evry advice about kx,cind of,whit wich things i hawe to be carefull to not ruin the engine.i live i place,where new parts four kx are so exspencive,and so hard to get them.so these advices are really important to me.thanks!