SOHC.co.uk Forums > CB350/400
400 Four Idle Problems
Lobo:
I too use a petrol 'preservative' (again, garden centre type outlet); keep the tank(s) full to minimise condensation / rust .... & to date never had a problem with any of the bikes fuel system wise.
Lobo
mike the bike:
Most likely the pilot jet emulsion tubes are blocked
exvalvesetdabbler:
I have used fuel preservative for storage over a good few years now and more recently, regular use of one that provides protection against corrosion due to the effects of ethanol in the fuel. Currently using Miller's EPS so only time will tell if this if worthwhile. I just keep about 10ml in a small minature glass bottle in my pocket and dose the tank when topping up.
http://www.millersoils.co.uk/pdf/automotive/Ethanol%20in%20Fuel.pdf
I have also noticed that fuel mixture is a bit leaner on modern fuel , particularly since replacing emulsion tubes and main jets with new OEM parts from DS. Previously the corrosion(and probably 30 years of wear) had enlarged the top of the emulsion tube causing over rich running. My pilot air screws are currently about 1 to 1 1/4 turns out to give smooth transition when rolling on the throttle at low rpm.
Modern fuel does seem to go bad quite quickly, even if a preservative has been used some of the 'goodness' seems to be lost over storage. After winter storage, filling the carbs and then draining again is necessary to get some good fuel in them , makes starting much easier.
We certainly never had these kind of problems with 2 star fuel when I were a lad.
Dave
Piki:
Great info exva!! where can I get it, I live in Spain..........could I buy it on Ebay?
Best Regards.
Chris400F:
There are a number of 'fuel preservative' listings on eBay (UK) but you will pay quite a bit in postage if you order from the UK.
Probably worth looking to see if there is anything similar available closer to you.
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