Hi,

As soon as I turn on the gas, it starts to pour out of the black (overflow?) pipe under the bike. The bike starts fine, and runs fine, but I can't stop the gas pouring out. Can anybody suggest a fix. Bike has only 900 miles, mainly off road.

Thanks

 

Sticking float probably. Dirt between the neede and seat.
Pull the carb bowl and give it a clean.
And if its pouring out, best to investigate where the dirt came from.

 

Yup float is stuck there.

 

Like Neil said