Cylinder Head Torque Settings

BSA A7 A10 1950 to 1963 all bolts 32 foot lbs
BSA A50 A65 1962 to 1965 two rear bolts 5/16" diameter 22 foot lbs
all other 3/8" diameter bolts and nuts 32 foot lbs.
BSA A50 A65 1966 to 1973 all bolts and nuts 32 foot lbs
SRM 750 , 850 and 900cc big bore head bolts with 3/8 threads 34 foot lbs
head bolts and studs with 5/16 threads 20 foot lbs. (do not overtighten)