SOHC.co.uk Forums > CB350/400
carb cleaing
PatM:
I fitted Keyster kits from the States- no prolonged leaks except when I first put the carbs back- done a few hundred miles this year since then.
59viperman:
:o bloody hell boys slow down, I am only just catching my breath after that lot. the consensus then is, strip clean build not worth it. just use it and it cures itself ? well that's the cheapest fix I have ever come across and one I will use, makes sense though .
Clem2112:
Well nearly.... you need to take the carbs off as a set then see what muck is lurking float bowls and address as above.
Re check the carbs for overflowing once they are clean and back together .....while theyr'e still off the bike , as putting them back on is the hardest part.
fisjon:
--- Quote from: Clem2112 on November 10, 2013, 08:49:30 AM ---I wonder if ultrasonic cleaning might just dislodge one of the blanking plugs/pellets ?
Found that the Keyster valves were worse so took the advice of others and used sime metal polish to "gently" clean up to float needle and valve seat.... No piddling carbs since.
--- End quote ---
Yes, ultrasonic cleaning can and does pop out the odd blanking plug. They are easily refitted with epoxy resin. After popping carbs in my unit I alway check to see what is lurking in the bottom of the tank.
DayvW:
I know this is years old - but thought I'd add something I have found in a recent carb strip - and that's that you get dimples in the brass tang on the float that the needle gets stuck in (hence why a tap dislodges it). I have read that a bit of emery to smooth the dimple helps to ensure the needle doesnt stick. I'm still in process of re-build so cant comment on whether this works (and I did find one float's hinge shaft was not straight so making it stick) - but before the rebuild I had to always switch off the petrol else risk a garage full of petrol!
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