[hr] I am having a fuelleak in the left hose, the one which does not have a connection, the next is not havening any leak, any ideas what cut it be?

 

When you say "left hose", what do you mean? The overflow/breather hose between the #1 and #2 carburetors?

IF so, then you have either a float assembly that is sticking, or one of those two floats has a crack or hole in it that makes it not "float" anymore. Float stays at the bottom of the bowl, gas keeps rushing in, fills up all the way to the top, and comes out the breather hose.

Take the carbs off and open up the #1 and 2 and make sure the floats are moving freely and not sticking anywhere. Also take out each float and make sure it still "floats" in a little bowl of gas. Sometimes they get little holes or cracks that you can't even see and they won't float anymore.

 

what i did to fix was , i let it ran until it did not have more fuel and is not leaking anymore . did i fix or i have to take apart the carb ?
another question can i use carb from and f2 or f3 in the f1 ?
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Well, if it doesn't happen again, you fixed it.

If it's a sticky float, it will happen randomly, which isn't fun.

I don't know about the F2/F3 carbs. They might fit, but you may have to use a different airbox or individual filters or something. $$$.