thanks for that lads ,seems .16 to .18 sounds the best bet all the other engine sound too much trouble with the rear exhaust hassle, ,so u guys reckon go for .18 piston,sleeve,C.rod ,will give more torque and i read on a post it gives better cooling ,while im here, i can never seem to tighten the head bolts right with out stripping the heads on the bolts [ any less tighter and the head seems to loose oil out and around the head, have this prob with all of my engines ] is their a proper hex driver u can get off cen or other crowds that work better than normal allen keys
thanks lads appreciate the help ,madmark