Err there are no adjustments, if you want to know there the reference
marks are and how to put the belt on correctly you need to BTFM.  IT
only goes on one way, if its not lined up correctly it is wrong and the
engine will run baldly or self distruct.

There are also no other adjustments on the engine (that need to be done
as part of service).  Sounds more like you want to check ignition timing
(nothing to do with the cam), again this is not necessary on the engine
and is not adjustable.

If you are applying aftermarket adjustment methods / parts you
definately should have a manual to start with.

Changing the timing belt is a detailed procedure but doable with basic
tools, again you need the manual otherwise if you start the engine up to
use this imaginary timing light the engine will self distruct.

There are marks on the plastic housing for the cam and intermediate
shaft and big washer like thing on the crank gear.  You line up the slot
on the washer with a metal rib on the block (aluminium housing).

Disassemble at TDC, slot on crank pulley should be at 0 mark on plastic
housing.

--
Tony

There's a notch in the the crank sprocket and a dot on the cam and aux
shaft sprockets. The crank has a mark above it you line that up to, the
aux shaft has a mark to the right, and the cam sprocket has a mark at
the top. You have to get these just right, one tooth off and it won't
run well at all. There are no adjustments, you just have to get the belt
on with everything lined up and then it stays that way.