SOHC.co.uk Forums > CB650

rough idle in current freezing weather

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jimv50:
Can't find anything online but do these bikes run rough when idling in the current freezing weather?

Norniron:
Are you using pods or original filter and airbox?

jimv50:
All original set up,no 'enhancements', correct good condition plugs etc,runs alright when thoroughly warmed up during a good run.
Just thought the bikes might be  sensitive to the cold.
I've screwed the idle up to 1300 rpm just to stop bogging down at the lights

hairygit:
One possibility is water absorbed by the ethanol in the petrol freezing and partly obstructing a jet due to the inrush of already very cold air.

jimv50:
Petrol all good, all flushed through after recent fuel tap debacle, all carb bowls drained and petrol looked good.
A thorough spray of carb cleaner will have to be done just in case.
New brass and steel feeler gauges ordered just now to give a bit of  tune up which I hope will help.
The more I do to it the less likely I'll trade it in against a Ducati Monster I've got my eye on.

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