[MBruns]

I use a simple method for the bolt drive cams, if it’s a new assembly I install rockers on one cyl. With the key ways up on both cams and at Z1 pin both sprockets, say your timing spec is 6mm, roll it through and if you see it’s going to be more than 6mm at one revolution stop at your timing value, unpin the sprocket and continue the crank to Z1 then repin and you will be very close, If you are short of your timing value (within reason) go beyond Z1 to your value and unpin and back the crank up a bit beyond Z1 then in normal direction aproach Z1 and repin. That way you aren’t sticking screwdrivers etc. in the pin holes and wrecking them.
Hope this helps, Mike Bruns