SOHC.co.uk Forums > CB500/550
CB550k1 US Import - UK registration
davidcumbria:
Glad you fixed it. These two videos show how the rocker shaft issue can affect the top end noise and maybe helps with a good / bad engine sound though everything sounds noisy on YouTube !
https://youtu.be/MDIkDb_HhKw
https://youtu.be/gDDK6ZOxmno
Oddjob:
It would appear the 550K1 still had the small rocker shafts that plagued the 500, I'd certainly think about checking them and seeing if the camcover has elongated or the shafts are showing damage.
Laverdaroo:
Successful fix that, how satisfying
Sent from my iPhone using Tapatalk
juitz:
Took the bike out for its first long ride yesterday.
Definitely a few things to address, specifically the sub-optimal idling. But it did a round trip to work (70 miles) and got back in one piece.
Thankyou so much to everyone with all the help and advice over the last 18 months with this project. Bunch of legends!
Like i said, few things to address still but to me a successful build.
Next up will be a 500 or 550 restoration to original.
I'll keep posting on this thread as I am sure I'll find a few more issues 😂
juitz:
I've got a bit of a head scratcher.
The bike will struggle to return to idle of 1100rpm when hot. It will sit at around 2000rpm. Tweaking the idle screw can help but it's overly sensitive.
So I thought to double check for any air leakage into the carbs, rubber boots, seals, etc.
Was a bit short on wd40 so sprayed a bit of carb cleaner at the carb area. When I spray the inlet manifold my engine will stall. Tried it with wd40 and nothing really happens. Sprayed carb cleaner again and it stalls again.
The engine is hot but I can't see anything being sucked in, it looks like it just evaporates. I'll try again with a cold engine but bit stumped why it stalls in the first place and why with one and not the other?
Maybe need to replace with new oring seals? I happens on cylinders 1 and 4 by the looks of it.
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