Bandit 600N Cutting out when weather is cold

[Jon_W]

Could be carb icing or could be a dodgy fuel tap.

[Blackandchrome]

Just a thought!
Maybe Carb Icing is a red herring.
Could the fuel filler cap vent have a blockage?
Maybe see what happens if you just release the cap.
Look for the simple causes first?
Good Luck and hope it is resolved soon. :-/

[Bikermouse]

My CBR400 did the exact same thing, a treatment of Silkolene FST did the trick and I continue to use it every few tanks when the temps start dipping just to keep him happy. If only all the other problems were as easily rectified... :P

kj

[Cemorah]

Does sond like carb icing usually more prevalent on wet days but as it now refuses to start I agree with tractor driver make sure fuel is getting to carbs:
Have you checked the operation of the vaccum fuel tap?
is there fuel in the carbs?
is there a hole in the vacuum pipe?
is it securely fitted over both ends?

If you need help on this give me a call on 07795 266230 I live in Cricklade.

[GaryMc]

Bike started yesterday and ran fine for 5 minutes but again got 1/2 a mile from home with me on it this time and died. Got it started again on the choke and limped home.

Thanks for the offer Cemorah. I'll give you a shout when my limited knowledge has been exhausted

[Mark_Able]

Our GS500's suffer carb icing. The morning start-up routine is:-

1. Start bike on choke, but try to adjust the choke down far enough to keep the motor running, but keep the revs down.
2. Run for about 10 minutes, then switch off.
3. Leave for about another 10 minutes.
4. Start without choke. It should rev and run freely.

Basically what happens is, the initial start up causes the carbs to start to ice. By switching off and leaving for 10 minutes allows the carbs to defrost. Starting up again, they normally run ok. We have found that sometimes they still won't run cleanly, but after a short ride and another switch off, it sorts it out. We haven't resorted to FST yet, but do know it works. [smiley=thumbsup.gif]

[quimby]

Had the same problem with my old 98 Bandit 600n, every time it got cold but as soon as I put some fuel additive into the tank it seemed 2 cure the problem [smiley=thumbsup.gif]

[jonnydangerous]

sounds to me like the carbs are icing....there are small air corrector jets and very small passages that ice over, the depression caused in the carb makes the already cold air even colder which alows ice to form.
the choke circuit is larger in size and will not ice the passages....
there is a way round this with larger air corrector jets, and ive heard that Dynojet kits sometimes cure carb icing (not by being clever, just by being different sizes) which may be worth investigating.
my RD250lc actually ices the carbs sooooo bad that all the circuits freeze except the main fuel metering circuit, and ice forms on the outside of the carb, and the bike runs till the ice collects in the float bowl, filling it with water!!!....

IPA (Iso Propanol Alcahol) can be bought from RS components....
the part number is RS 567-890 and is advertised as a circuit board cleaner......500mm cans :-)

[GaryMc]

After finding that there were 2 faults on the Bike we have it up and running again. The ignition switch had worn to the point of not letting the starter turn over so a new one is required but can get it to work at the moment but the original fault was the fuel tap. If you run the bike with the tap in the normal "fuel" position it will only run for around 10 minutes but if you leave it on "prime" it runs fine

Heading up to GW's and Artdeans to get quotes on the ignition switch and get the tap replaced this week.

Thanks for all your help guys and gals [smiley=thumbsup.gif]

PB

[Robf]

good to know that the problems almost sorted