For the torque on the 66cc engines with the larger 8mm studs you dont want to exceed 14 ftlbs and on engines with the 6mm head bolts (49cc) you dont want to go over 10 ftlbs and be sure to check your torque a few times during breakin. They do losen up until they are settled. Another good idea is to replace the "acorn" nuts most kits come with for a regular nut. Sometimes the acorn nut bottoms out on itself before really tightening the head down giving you a bad torque reading and leaking head gasket.
ps dont tighten them when the engine is hot- only when cold.
Last edited by bluenosegoat; 02-15-2011 at 07:52 PM.