Ticking noise from top part of engine

[bflint]

Dave, the Air Injection Control Valve is for purging the charcoal canister. Its part of the evap. emissions system.

As far as the diagram showing 2 and saying you need 4. Look closely at the space the reeds go in. There are 2 spaces per side. So 4 number 8 and 4 number 5 are needed.

Thank you Lord Popgun. Maybe somebody else can reply concerning the O-ring.

From my recent 2014 CB1100DX experience only parts involved are:
1. VALVE, REED (ARAI) 18601-KEA-741 qty=2
2. PLATE, PORT (AI) 12341-MAT-750 qty=2
I did not have to replace them. They cleaned up just fine with white vinegar.
There is no O-ring for this assy.
The valve cover assy has 4 O-rings (GASKET B, HEAD COVER 12396-KCR-940) assoicated with it but you don't need these unless you remove the valve cover.
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IMPORTANT NOTE: Removing the Reed Valve Cover exposes the Reed Valve which has a very deceptive brass screw head showing. Don't attempt to remove the screw ... it is not meant to be removed! The whole rubber/metal Reed Valve assy just pops out, BUT not easily because of all the carbon build up. I cheated when I had the valve cover off by using compressed air to blow it out.