Topic: Cam cover for '75 550F

[bistromath]

Guys, I've got the dreaded cam cover wear caused by rocker shaft movement. I'm in the market for a late 550 cam cover (if anyone has one they want to sell me, by all means pipe up!). I found this one on eBay:

http://cgi.ebay.com/ebaymotors/Honda-CB500-CB500-CB550-CB-550-Valve-Cover-Polished_W0QQcmdZViewItemQQcategoryZ35595QQihZ014QQitemZ330246884044QQrdZ1QQsspagenameZWDVW

He says it's off a '73 CB500, but it's got the four bolt holes that I'm looking for in a late 550 cover to hold the rocker shafts down, right? What am I missing here?

[TwoTired]

For a late model assembled cam cover, you need to look for four studs and nuts as well as those four holes under the breather cover.  Like this:

[bistromath]

Thanks TT.

[Dave-and-his-550]

That thing is only selling for $25!? That seems really cheap to me! Maybe I should buy it? Or this is not the one that I can use to replace my screwed up one on my 76 550F?

[bistromath]

It'll fit, but it's not the upgraded one that holds the rocker shafts in place.

[Dave-and-his-550]

For a late model assembled cam cover, you need to look for four studs and nuts as well as those four holes under the breather cover.  Like this:

Just curious, what year's had this upgrade? Was it all throughout '77 or later? I'm about to email a few guys asking about this.

[TwoTired]

Honda Service bulletin 500/550 #8  Issued 8/11/76.

Improved cylinder head covers were incorporated in engines beginning with these serial numbers:

Cb550K  #1083641
Cb550F  #1133172

These numbers occur near the end of the 1976 model year.

Cheers,

[Dave-and-his-550]

Perfect thanks!