Does your bike ever warm up in this freezing cold mist?

[apple tango]

[teabag]

I thought carb icing was caused by the pressure drop and vapourisation of the fuel in the carb causing a temperature drop well below ambient which causes the moisture in damp air to freeze.
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NS125R = 2 years > GSX600F = 7 years > XR125L = 3.5 years > SV650S........and a Citroen Synergie HDI for the kids.

[Noxious89123]

[Reppyboyo]

Usually takes about 5 mins to get my Triple up to temp.
Now it takes around 10ish.

Annoying when you want/need to open it up abit.

[instigator]

[Noxious89123]

[instigator]

[Noxious89123]

Away with thee! Stop telling nasty lies about my beloved Mr. Honda.

And go fix your broken SRAD
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[MattShill]

I don't know a lot about carb icing since I've never had to deal with it, but as far as I've heard the main cause is the expansion that the fuel undergoes as it is sucked into the low pressure airstream. Something like the fuel getting vapourised is effectively expanding, which reduces the temperature in the way you'll have seen if you've ever touched a spent camping gas cansiter as the last gas escapes. The effect can drastically reduce the temperature, so even though you wouldn't expect it, it still may be possible at relatively 'high' ambient temperatures. Couple that to the fact that running with the choke on creates even lower pressure in the air flow, I guess its possible that it could ice.

Having said that though, my bike runs like a dog if I actually ride it with the choke on in any weather, and the rough running could be cause you're forcing it to run rich. I reckon the choke is only meant to be used until it'll idle smoothly by itself, and even if it's a bit lumpy at low revs I'll still take the choke off as soon as I start riding and just hold it at about 2/3K on the throttle at traffic lights and stuff if it still feels like it needs it. I've been riding the kwak through the winter and it hasn't let me down even in mornings when I've had to shake ice off the cover first. Not bad for a 10 year old budget bike.
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Living life in the second overtaking lane!

'98 Kwak ER-5

[apple tango]

I bought a can of Silkolene Pro Boost today. I hope this is the same or similar to the FST stuff. It does say it reduces carb icing on the back.

However, it comes with fuck all 'directions of use' so i have no idea what i'm doing with it.

I have poured 60ml of the stuff into my petrol tank, which was close'ish to being full with fuel.

When i need to fill my tank up again, do i need to chuck some more of this Pro Boost stuff in there?
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CBR125 -> Bandit GSF600 '99 -> SV650 02

[Kickstart]

Hi

apple tango - I would doubt it is carb icing as it appears to be happening from cold. With carb icing I would expect it to be OK when started, and OK in low speed riding, and become a problem after running at speed.

Starting it and warming it up for a while would have negligable effect on carb icing, but would help if it is just running lean at idle.

If it is a bit lean or cold then check the thermostat is working OK, and consider blanking part of the radiator off (bodge but might help). Also consider richening the idle mixture up a touch.

[Noxious89123]

[ajb]

[Noxious89123]

I find that if i put in a full tank of fuel from being nearly empty, the motor has a fair bit of extra kick. Fuel fresh from the pumps is colder than whats been sat in your tank for a while, as it's stored in tanks under the ground, nice and cool.

Colder fuel = Denser, but more to the point, it cools the air that it being sucked in with it.
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[cicatrez]

not really had any problems. I try and start it normally, if it dont work, half choke. if that works, I'll test full choke to see if it idles better. then ill use that for half a minute. and test half choke to see if it idles more freely. then I just go back indoors and carry on putting my jacket,helmet and gloves and getting my backpack. When I'm suited up and ready to leave. I sit on the bike, choke off, hear how it idles, and giving it afew full revs of the throttle to make sure it doesn't sound like its flooding, or if its still cold and needs more choke, but usually it doesnt at this point. and is is after warming it for 10min or so.
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'02 Honda City Fly

[apple tango]

[quote="Noxious89123
PS: Pro-Boost only has a minor effect on carburettor icing; it is primarily an octane booster. Likewise, Pro-FST
has a minor positive effect on octane rating, but it is not a good idea to use it as an octane booster, because it's a carburettor de-icer![/quote]

Quoted from here;
https://www.silkoleneoil.com/techtip7.htm

So it'll do what you bought it for, it's just that Pro FST would do it better.[/quote]

Cheers
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CBR125 -> Bandit GSF600 '99 -> SV650 02