carb icing

[luke139]

hi, i was told that my carb is freezing in the cold weather, what can i do to prevent this, i have been told to get silkolene but this is quite expensive, does anyone have any other ideas?

[rotax81]

depends what bike it is. you need to get some heat in the airbox for winter time.
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ZX636C6F road. ZX636C1H track. ZX7R redundant. ZX0.5R minimoto as ornament.
Audi A4 Avant 1.9TDi and VW Transporter 2.5TDi 888 Special (no mot and tax lol)

[Kickstart]

Hi

Carb icing is caused by the carbs getting cold (from the cold air running through it, and also the heat taken from the carb by the fuel being taken from it), resulting in the moisture in the air freezing in the carb.

The fuel additives can work (there were some sold for VW Beetles which were prone to carb icing, which might be cheaper).

More major solutions are to keep the carb warm. Warm the carb body (either bypass some coolant through the carb body, or electrically heat the carb). Warm the air going to the carb (commonly way it was done in old carbed cars, with the air intake in winter being near the exhaust), or probably warm the fuel.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[tutton]

The silkolene isnt that expensive 13 pound a bottle.
and it runs at 100:1 or 50:1
=/
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[LeeR]

Agreed, I've just recommended Silkolene Pro-FST to someone else on here, used to use it myself, but the latest bike is FI so I don't need it anymore.
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My claim to fame: Austin Vince nicked my pen...

[Hutchysrs50]

as said, what bike is it?

most 50cc and 125cc have 2 pipes going from the cylinder head to the carb to put warm water into it.
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Gilera SC 125 - Current