Bluemel lists the valve timing as follows but I can't be certain it is correct inlet opens 27 degrees BTC inlet closes 65 degrees ABDC Exhaust open 74 degrees BBDC Exhaust closes 16 degrees ATDC and cold valve clearence .15mm intake, .2mm exhaust You can always have a look at the flywheel and see if those numers make since with the ones stamped in the flywheel. Zac
As per Factory Bld Sheet FOR 6041SA factory designation for SF was SA on build sheet D = AA 26/65 S = AA 26/65 CS 73/15 CS 72/16