Valve Clearance Question

 2006 Honda Shadow 600.  2 cylinders, 6 total valves, 4 total plugs.

I read the shop manual valve clearance procedure, and it all makes sense ...
it basically says to rotate the crankshaft to a marked location and then
adjust rocker arm thingies until a feeler gauge just fits between two
specific pieces.  Piece of cake, I hope.

Questions:

a)How do I tell the intake valve linkages from the exhaust valve linkages?
My bike has 3 valves per cylinder (I'm assuming 2 intake and one exhaust).
How can I figure out which is which?

b)I'm assuming that the cam shaft rotates once per each two rotations of the
crankshaft?  I find it odd that they specified crankshaft position but not
camshaft position (i.e. at a given crankshaft position there could be two
camshaft positions?).  I'm assuming that is because at TDC for the cylinder
whether it is between compression/combustion or between exhaust/intake the
valves will be closed, so it doesn't make a difference?

Thanks for all.

 It's more obvious once you get the valve cover off and have a look-see.

The exhaust valves are the ones next to the headers, where the exhaust
goes out.  The intake valves are the other ones, near the carbs.

Turn the crank a couple times.  You will see the valves get compressed,
then you'll see where they no longer even touch the camshaft (i.e. there
is clearance).   Why they specified crankshaft position I don't know.

 
Got it.  That makes sense.


Me neither.  They actually have you remove two access ports in the
crankcase, one to turn the crank manually and the other to view marks in
some internal engine part so you can get the crank positioned precisely.  I
don't know why they are so careful about the crankshaft positioning.

As I mentioned in the other post, I misread the shop manual instructions.
It says "TDC in the compression stroke" which eliminates the ambiguity about
camshaft position and means I guess that one may need to turn the crankshaft
up to nearly 2 rotations to get it into position.

Thanks for all.

 
There are fairly long acceleration ramps to gently take up the
clearence before quickly lifting the valve, and to gently lower the
valve back onto its seat.  It's not important that the marks be
perfectly lined up.  Having them in the ballpark will assure you that
you are in fact measuring the full clearence.  If you can't see the
marks then you are guessing.

 
Scratch (b).  Re-read shop manual.  It says TDC on the compression stroke,
which eliminates the ambiguity.  I didn't catch "compression stroke" the
first time.