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Author Topic: CB550 Valve (cylinder) cover differences?  (Read 864 times)

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Offline shamrocks

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CB550 Valve (cylinder) cover differences?
« on: January 17, 2018, 10:25:32 AM »
Hi
   I have a k3 and am looking for a new valve cover for it, I see on ebay a valve cover series B and a valve cover series A.  What are the differences?
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Offline Bankerdanny

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Re: CB550 Valve (cylinder) cover differences?
« Reply #1 on: January 17, 2018, 12:50:25 PM »
The covers are interchangeable. The difference is that the rocker shafts on the '77 and '78 covers have pins in them that prevent them from rotating whereas the 74-76 covers don't and over time the action of the rockers by the cams can cause the shaft to move and elongate the holes that it sits in, making it basically impossible to properly adjust the valves.

Why do you think you need a new one?
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"The problem with quotes on the Internet is that you never know if they're true" - Abraham Lincoln

Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline shamrocks

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Re: CB550 Valve (cylinder) cover differences?
« Reply #2 on: January 17, 2018, 08:04:46 PM »
I cracked one of the fastener tabs.  Been trying to find someone local to weld it for me, but I'm moving to SoCal in the next few months I may just wait till I get there.
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Offline RAFster122s

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Re: CB550 Valve (cylinder) cover differences?
« Reply #3 on: January 18, 2018, 01:52:15 AM »
Micro welding expert can do it and he is a member here.  Send it off to him and you will not be disappointed. Drawing a blank on his name... sorry...trouble with names.  Want to say Jim.

Jim French maybe?


Jim F is the user id...he likes turbo bikes...has one he built as his signature's image.

David
« Last Edit: January 18, 2018, 01:55:19 AM by RAF122S »
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David- back in the desert SW!

Offline shamrocks

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Re: CB550 Valve (cylinder) cover differences?
« Reply #4 on: January 18, 2018, 09:44:01 AM »
Thank you!
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