SOHC.co.uk Forums > CB500/550

Cold start

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Ashdowner:
Does anyone have trouble starting their CB550K from cold? Mine has suddenly become temperamental and fires but takes ages to get going. Pulling the choke doesn't seem to help. Also my petrol filter fills up quickly with little globules that look like Red Hermatite, although the tank looks shiny inside. Any ideas?

Bryanj:
Globules = water in tank, is this a K3, if so you need to get out the press in pilot jets and give them a real good clean

mike the bike:
Check that pulling the choke knob actually does its thing on the carbs.   I've had a 650four with the same problem.   Pulling the knob didn't operate the mechanism on the carbs because the outer cable  clamp was loose.

Ashdowner:
How do I get water in the tank Bryan J? The tank looks to be in good condition and the cap and cover flap seal fine. Also is kept in a dry garage.

royhall:
A quick check of your choke cable as Mike suggests will only take a minute so worth doing to eliminate an easy fix first.

But I agree with Bryan, if your finding globules in the fuel filter that's going to be your problem.

Will need a full fuel system clean out, tank/carbs/lines/taps and replace the filter.

Had this happen to me a long time ago. The bike was in a garage that got red hot during the day and cold at night (tin roof). I put the water down to condensation due to the huge swings in temperature (maybe the same)?

With a bit of luck it will be your choke cable.

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