The camshaft runs in bearings, up to and including Evolution in plain bearings or needle bearings. Tolerance in these bearings must be within specs. To prevent the camshaft from jamming when fitting the timing cover, it must have a certain amount of lateral play, on all engines up to the Evo. Take the gasket into account when testing and measuring! Approximately 0.1 mm is sufficient, even if H-D allows up to 0.125 mm.