Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: billdn on May 24, 2021, 10:45:50 AM
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Having stripped the carbs ready for a clean, to my mind the brassware - jets , emulsion pipe etc look to be in good order. Is there any checks I should be doing to make sure they're ok or just bite the bullet and replace anyway? Gaskets and seals etc I have. I just don't want to reassemble , refit and then have to take them off again!
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If you can keep the old jets but make sure they are clean and free of varnish and old petrol residue. I found with my new Keyster kits the float valve leaked on all four of them. I replaced with the old ones and problem solved.
There have been various threads on here about buffing the seat on the float valves with a cotton bud and solvol to ensure a good seal but it didn't appear to work on the Keyster valves I had, they just kept leaking.
Make sure the pilot jets are 100% clear, , my experiance over the weekend with the Kawasaki Z400J pilot jets is a case in point. They may look clear even after four ultrasonic baths but they were still blocked >:(
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I had problems with aftermarket float valves leaking too - after several attempts, many rounds of tweaking float height, I put the original float valves back in - after ultrasonic cleaning them - polished the ends with a bit of wire wool - no leaks after that - also - worth trying to rig the carbs up so you can test for leaks before fitting back on the bike - I suspended mine over a washing up bowl and filled the float bowls - save you a lot of time if you do get leaks -
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When I did my CL450 barn find, I got nothing but grief from aftermarket carb 'repair kits', and ended up going back to cleaned up original parts where at all possible.
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Thanks all! :)