From my Megacycle spec sheet: (I know they're different, but you can use this as a baseline for measurements)
Quote:
Timing Card: Make and Model: TRIUMPH 904cc Speedmaster
Cam# 520-x1 in/ 520x3 exh
Timing at 0.040" lift at valve
Timing checked with ZERO clearance
(see running clearance - lash below)
Intake:
open - 24º BTC
Close - 52º ABC
Valve Lift - 0.408"
Duration - 256º
Lobe Center - 104º
Lash or Running Clearance (cold) - 0.006" to 0.008"
Exhaust
Open - 54º BBC
Close - 18º ATC
Valve Lift - 0.385"
Duration - 252º
Lobe Center - 108º
Lash or Running clearance (cold) - 0.010" to 0.012"
And you need to figure out the difference between BBDC and BBC to get an accurate number. Aren't they the same???
Good luck, sounds like a fine project.
