Strange timings on that cam, offset lobe centers.
Dunno what lift you're measuring at, 0.000", 0.012", 0.040", or 0.050"?
Intake duration 266°, lobe center at 111° atdc.
Exhaust duration 285°, lobe center at 98° btdc.
Intake opening sure looks late.
Would need to shorten the intake guide.
Suppose you were to advance its timing by 11°, even up the overlap.
That would give:
Inlet 33° btdc, 53° abdc, 0.430" lift.
Exhaust 71° bbdc, 34° atdc, 0.400" lift.
Suppose you were to advance its timing by 6°, equalize the lobe centers to about 105°.
That would give:
Inlet 28° btdc, 58° abdc, 0.430" lift.
Exhaust 66° bbdc, 39° atdc, 0.400" lift.
Strange grind, indeed.
You could try to get a copy of Signal's "cam lobe centers" spreadsheet.
http://www.xs650.com/threads/attaching-an-excel-spread-sheet.35200/
Grind thru this.
http://www.xs650.com/threads/what-do-i-need-to-degree-a-cam.34965/
Play around with various advance/retard timings until you get something sensical...