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New carbs aren't known for leaking unless you had it open and altered some thing. A float can get stuck if you let it sit without using it. Should put stable in your tank and run it so thestable gets into the carbs.
Check above the carb for a gas leak from the gas hoses and check the gas tank. They may be running down onto the carb and just appears like the carbs leaking
Is the carb flooding?is there black smoke coming from exhaust when running, if so it could be the carb over filling with fuel. Is there petrol leaking out of the carb? If not check the fuel pipe is in good condition
This is a carb flooding issue, there will be a rubber tipped needle in the carb, if this is not seating properly fuel will leak through the air filter, you need to go into the carb, check the metering lever height and replace the needle, unfortunatly it is not possible to replace the needle seat so if it continues to leak after fitting a new needle it will be a replacment carb.
Hi Thats the float valve seals not shutting off, did you clean them & set the float heights? The overflows from the carb bottoms must also be blocked for the fuel to fill up the carbs which then leaks into the air filter Check also that the fuel tap turns off when bike is not running
It could be a bad gasket or o-ring that needs to be replaced. Is it possible something vibrated loose and you're missing a part? You can probably get a carb rebuild kit that will provide many of the gaskets, etc. you would need to repair it unless there is some physical damage to the carb itself. Also check the fuel line carefully to be sure that is not the source of a leak that is running along the body of the carb and dripping from somewhere else....
I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!