kz900 cam timing question

[knut]

hi,i was checking my cam/timing yesterday ,and it looks like my inlet sprocket is 1 tooth of place ,in a clockwise direction,at least thats what i think,should the cam arrow line up directly with the cylinder surface ? i,ll try and post a pic of it tonight ,another question , would that explain 1 & 2 cylinders running rich and 3 & 4 lean ? ,or has the cam chain stretched? mileage is 27 k miles and the cam chain was very noisey when i got it,i adjusted it back then , and it sounded ok .any help much appreciated
thanks guys

[chrisu]

I posted a picture showing what the config should be a while ago but here it is again.....................

[Garn 1]

Knut, If you haven't done this job often it is easiy to make a mistake. I have seen them run being a tooth out and you will be frustrated.

A couple of things That I now always do~

Get some white paint or typist white-out and carefully put a dob exactly on the small arrow engraved on the exhaust cam sprocket.
Do the same on the arrow and 28t mark on the inlet cam sprocket.
Now, put a dob on the TDC timing mark and keep checking that it does not move from the mark.

You may often think you are not on the mark, as the cam is acting against the spring pressure of some of the valves, allowing the camshaft to be not fully seated. When finished both the inlet & exhaust cams should oppose one another (or vice-versa?)
RegardZ

[Jon]

Lot of folk make the mistake of lining up the marks with the top of the head as per modern bikes. Problem is tho Z`s have the idler sprocket 1/2 way between the cams which moves the marks when its bolted down. Just a thought.