SOHC.co.uk Forums > CB500/550
CB550k1 US Import - UK registration
Oddjob:
It stalls with one but not the other because one is very volatile and the other isn't. What colour are the plugs? Have you checked the rubber insulators for cracks? Are the alloy washers on the vac screws? Probably looks like 1 and 4 because those are the outside cylinders so easier to get the carb cleaner to them.
Have you changed the orings on the inlet manifolds at any time?
juitz:
--- Quote from: Oddjob on July 15, 2023, 01:29:11 PM ---It stalls with one but not the other because one is very volatile and the other isn't. What colour are the plugs? Have you checked the rubber insulators for cracks? Are the alloy washers on the vac screws? Probably looks like 1 and 4 because those are the outside cylinders so easier to get the carb cleaner to them.
Have you changed the orings on the inlet manifolds at any time?
--- End quote ---
Rubber insulators are brand new and I put new orings that came with the vesrah seal and gasket kit I purchased from David Silvers. But I think i am missing the alloy washers on the vac screws you mentioned. Missed these from what I can remember so i'll get some on order if I can find the part no (not seen in the parts manual)
Multiman:
This is Julies eBay shop.
Contact her direct for a better price
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juitz:
So decided to take the carb inlet manifold off as I had a suspicion that I had not masked ithe mating surface during painting. Sure enough it was painted and I could see small clumps of paint. Removed the paint wire a copper wire wheel and reattached the carbs. Did the carb cleaner test again and it doesnt stall anymore 👍
Went through the carb vac sync again as well and seems ok-ish.
The bike still hangs at around 2k but it does drop back to 1300rpm idle after a second or two. I did note though pressing on the brass caps on the slider mechanisms it will return to idle immediately. Does this indicate a sticky mech?
Throttle cables look to have enough slack.
Also, bike revs ok up to a semi aggressive throttle twist, but going full WOT instantly the engine will cutout?
Bryanj:
Sounds like you may have bench synced with the slides too high
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