SOHC.co.uk Forums > CB350/400
Coaxing life out of the old girl...the second attempt!
tom400f:
Have you cleaned your carbs ultrasonically, Dave? My feeling is they are gummed up inside...
ManicGTI:
--- Quote from: tom400f on February 01, 2016, 08:29:50 PM ---Have you cleaned your carbs ultrasonically, Dave? My feeling is they are gummed up inside...
--- End quote ---
A fair point...I haven't. I cleaned them with white spirit, tooth brushes etc. A friend at work has just bought a small cleaner so maybe I can call on his services. Maybe I need a cutaway of a carb so I can work out what channels I may not have cleaned sufficiently.
--- Quote from: royhall on February 01, 2016, 02:12:22 PM ---Have you set your carb slides too low so they are fully closed. Managed to do that on my 350f.
--- End quote ---
Have I missed something when 'bench syncing' the carbs? My understanding from the Haynes book was that I set the Sliders to the same level at WOT.
--- Quote from: rozabikes on February 01, 2016, 04:37:33 PM ---Seem to remember when I had similar problems with my 400 after gummy carbs, it was blocked emulsion tubes. Have you removed them and inspected all the small holes are clear. I then found it would start but not run at lower revs - then it was the slow running jets.
--- End quote ---
I did clean the OEM Tubes, but have now fitted new ones from the cruzinimage rebuild kit.
totty:
Sounds like the bench sync could be the issue, you can do them open or closed, but doing them open can result in them ending up fully closed.
To check all passages are clear and gain an understanding of what leads to where just spray carb cleaner in each hole and see where it comes out.
ManicGTI:
Ok, I'm back!
I moved house in April and insisted on getting a garage (incredibly rare in London), happily it means that last weekend at last I was able to get the old girl out of storage and down to the house. Should make the trouble shooting process a little more achievable.
Dave
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