SOHC.co.uk Forums > CB500/550
Initial Startup really bad idle - Help Needed
Noelia:
I have more or less the same problem with my cb550... Checked valves, cam chain... All is good carbs are balanced but the idling is still shit! Getting very frustrated... The rattling noise goes away if the revs are higher... I got it in a garage right now for second time...
Noelia
Aly-b:
I think item three on your to do list is a good starting point as you may have some blockages.
Aly-b:
--- Quote from: Bryanj on April 01, 2016, 08:48:49 AM ---May sound like a daft question but you haven't left anything under the seat then shut it have you? Also check that the advancer is working Plus Idle is normally at about 1100 RPM
--- End quote ---
Not a such a daft question,I owned a Bonneville back in '73 and left an item under the seat (where the coils are located).
Caused a short on one coil thus giving an intermittent misfire while riding.
paulbaker1954:
Noelia be keen to hear what the garage pro finds on yours
I agree with Aly that most likely is a blockage in the primary idle circuit as once the main jet takes over all is good
deltarider:
Did you adjust the camchain?
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