cam gear letters

[71124spider]

what is the "S" and "A" for on the spider 124 cam gears?

[spider2081]

I don't know what the letters stand for however I am pretty sure the "A" is the intake cam wheel and the "S" is the exhaust.

[71124spider]

the reason i was asking is because the haynes manual has a diagram and it refers to the S and the A as the timing marks for the cam gears---pg 27 and i am sure its wrong--the holes in the gears are the marks that you align with the pointers.

[aj81spider]

S is for scarico (exhaust in Italian) A is for Aspirizione (air intake).

I didn't know that but it was posted on a previous thread that I can't link to because I'm on my iPad.