SOHC.co.uk Forums > CB500/550

Carb flooding

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masonmart:
Tried to start my Dresda 500 today but on turning the petrol on found it flooded out of the overflows. Will take them off tomorrow to have a look at the floats and needle valves but any thoughts on what else I may need to look at?

Many thanks

davefirestorm:
Could be float needle valves not seating properly a common problem on Superdream carbs and Quick is heady fix is to remove float bowls/floats/ needle valve and use a cotton bud with solvol autosol to lap the face where needle valve seats,thouroughly clean and blow out after.

matthewmosse:
Common on cb500/4,  mine was almost always sorted by redex or  a light tap on the side of the carb with a soft  handled screwdriver. I cannt think that I ever took the carbs off as redex added neat in the fuel pipe was the most involved fix I ever needed to do. Seemed to crop up every 6 months or so when the bike was my only transport and racked up some serious milage.

masonmart:
On other Japanese bikes when one out of 2 leaked I used to take off the bowl and let fuel flush through the needle valves or just tap the carb with a driver but these are all seeming to leak. The redex tip is interesting, never heard of it.

matthewmosse:
They sell it in lots of places, eg Tesco's, Asda and poundland all carry it. Comes in different types though I'm not sure of the differences but it's basically an additive for fuel, Personally I have had great success with it, both the diesel formulation which I used in my 4x4 dumper that was getting cranky to start - not good news on a hand cranked diesel but pre dosing it with redex you could crank all day if the temp was under 10°c and if wouldn't start, after a dose it now starts first try right down to freezing.

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