I just siezed a brand new top-end with a cp 13:1 piston. the piston started to gall up and smeere aluminum all over the inside of the cylinder. rear wheel just locked up out of nowhere while cruising down a trail at ocotillo. bike has less than 1 hour ride time after fresh top-end I took it to CP to ask them why they thought that would happen on a fresh engine and they insisted that there was not sufficient oil to the cylinder. So the big question is.. How do the cylinders get their oiling? is it just oil splash from the crank? or is there like and orfice that squirts it up there for wrist pin lubrication etc? I know there is a mod on the 450 quads to drill into the oil galley and effectively oil the top end better but not sure if it applies to the dirtbikes. Maybe one of you experts can shed some light on my problem. Thanks!!