Please check your tensioner alignment marks.

Here'* my UPPER tensioner (you don't have this one) to use for reference:




Note the scale on the black portion. This is shown UNDER tension. You want the arrow to line up with the vertical line just to the right (ideally). Shoot for the area between the two nearest lines (the smaller of the two 'scale sections). Think of the wider zone as 'bad', and the narrower zone as 'good'. If you are in the 'bad', replace the entire tensioner. As you can see, the part number is on it. Yours is different than the one pictured. Go by your number.

OK, don't give up yet!

You mentioned above that your pulley seems to jump now and then at idle. That may mean that your tensioner spring is going bad. Here'* a fairly recent thread that talks about this:

Question on Belt Tensioners What is the correct setting

I may very well be that you have to replace your tensioner.

EDIT: It looks like Bill beat me to the punch, but the thread I linked is still good information for you.

Sorta beat you. You covered the other method.

I didn't have a good picture of the tensioner and you did. That'* a good one for this instruction.

We need to team up on a Techinfo. Showing the use of a standard torque wrench procedure too.

OK, I'll take that on if I can use a link to your picture above, or steal it and put it in the gearhead photobucket.

GH PB it.

I can shoot the lower also. It'* harder to get to, but has more of a direct bearing on the L27'* than what I pictured above.

Sounds good! I also found this one in GH PB:

I've got an S2 laying on my floor at the moment.. all dolled up with belts.