LC water cooled carb

[chaz35]

I took my carb out to clean, was really gummed up, still working on it to free up the idle and main jets.  I was amazed to find coolant being piped through the carb.  Overkill, but interesting.  I bet some just splice the carb coolant hoses together rather than connect back to carb.  A fair amount of trouble to disconnect/ reconnect 2 more hoses to the carb.  I will probably put it back the way it was.  Ciao

[BettinANDlosing]

The reason for this is simple: You want the fuel being atomized to be a consistent temperature. If the carb didn't have a heater mechanism your jetting would be terribly effected by the outside temp. All carb. bikes have some sort of heater, the air cooled bikes have a hose from the cooling shroud blowing hot air. The 250's have electric heating elements. Your bike will run better with those hooked up.

[tortoise]

working on it to free up the idle and main jets

Guidelines

[BettinANDlosing]

The best thing for the idle jet is a strand of cable from like a scooter or bicycle. Just get one stand, and ram it through the idle jet until you can see light

[gn2]

Coolant piped through carburettors is to prevent icing by heating them up.
A real problem in aircraft where you can't just pull over to the side of the road......

http://www.skybrary.aero/index.php/Piston_Engine_Induction_Icing

[BettinANDlosing]

That's only part of it on scooter engines

[gn2]

Really?
What's the other part?

[BettinANDlosing]

I already explained ^^^^^ icing of gasoline is not a big deal unless your way north. The main reason for a heater element on scooter/bike carbs is to keep the gas charge at an even temp. Think about it, if its cold enough to ice up, the coolant won't be warm enough to de ice for the first 10 minutes of riding.

[BettinANDlosing]

P.s. You don't have to be condensing in ever reply.

[gn2]

Carburettor icing can happen when the ambient air temperature is well above freezing.