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Messages - buzzens

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CB500/550 / Re: CB550f running too rich on Marshall exhaust...help please
« on: March 03, 2014, 11:21:22 AM »
I have now finally traced and purchased NOS 3 needle & jet sets which now completes all the parts I require to put the carbs back to original Honda from the Keyster kits, this includes NOS main and slow running jets purchased quite some time ago. Just got to find the time to do it now...

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CB500/550 / Re: CB550f running too rich on Marshall exhaust...help please
« on: September 26, 2013, 10:46:20 AM »
Once again thank you all for your replies. I too have heard about Keyster carb kits been a problem, they list the jets as per standard CB550F. The kits I got are from a company in Canada; Cirrius i think was the company name or something similar. I can't find any genuine kits anywhere at the moment, so I think my chances could be slim, maybe look out for a 2nd hand set of carbs.
Cheers

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CB500/550 / Re: CB550f running too rich on Marshall exhaust...help please
« on: August 30, 2013, 10:48:43 AM »
Thank you for all the replies. I shall answer the queries. The carbs are balanced ie equal vacuum within range using davida vacuum gauges. I do have both Haynes and Honda workshop manuals. The airbox is standard. The carbs when restored was set to standard settings on rebuild. I used Keyster parts for the rebuild, part no KH 0151F. I have checked for restrictions within the airbox and intake area. I have run the bike with no air filter and removed the airbox, and we all know how awkward that is! Unfortunately I have thrown the original jets etc away so unable to refit the originals; hindsight is a wonderful thing! I did get a comment from a guy who repairs old Hondas' and he said that he has come across Honda 4's fitted with a Marshall need to be re-jetted, but surely not to the degree that mine is running. I agree that there shouldn't be a need to re-jet which makes me think there could be a problem somewhere else; maybe the keyster kits are not as accurate as they should be. Thank you for welcoming me to the forum; it is really appreciated.

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CB500/550 / CB550f running too rich on Marshall exhaust...help please
« on: August 01, 2013, 06:28:20 PM »
My CB550F1 is running way too rich, fouling all plugs to the point that it will stop. I have during restoration renewed both coils, caps, plugs, carb overhaul kits. carbs have been balanced. I have even dropped the needles onto their lowest settings and even lowered the float height (bad practice, I know). I had never ran the bike before I restored it so not sure if problem existed before. It is, and was, running on electronic ignition, and a new Marshall/Laser Deeptone 4 into 1.
If it requires re-jetting; what jets?

Many thanks for your anticipated replies.

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