I did a full rebuild, ran fine , no leaks , after I broke it in and I changed the oil so I could really ride it I notice it was leaking coolant from the head gasket on the front of the motor below the exhaust pipe. I rebuilt it with a 102 piston and jug kit, using a cosmic gasket kit. Should I just retorque the head bolts ? Or should I change the gasket out again, and if so can I use a stock bore ome gasket and not a 102 bore gasket b/c I don't have another 102mm gasket.??? Also if I was to take the head back off could I re use the head gasket that's on it now since it don't have any hours on it other than break in stage, it's a cosmic gasket?