Step 1:
Zero a timing disc on your crankshaft with the engine set at top dead centre

Step 2:
Rotate crankshaft in direction of normal rotation (after TDC) to the specified full lift position

Step 3:
Establish, with the aid of a clock gauge, that the inlet valve has achieved maximum lift and is in the middle of its dwell period

Step 4:
Adjustments on the cam pulley can then be made to achieve this

Step 5:
If your engine has a separate exhaust camshaft then return to top dead centre and rotate the crankshaft to the quoted full lift position before top dead centre (opposite direction of rotation) It is at this point your exhaust valve should have reached maximum lift. Once again fine adjustments can be made on the cam pulley