Hi everyone I've got a Gasgas txt pro 2005 300cc and it starts up fine and warms up then after about 5 mins of riding it will cut out sometimes rev up first then cut out I've cleaned the carb and checked the fuel and spark plug any info would be great thank you

Check the gas cap / vent. Also there was a post by Sting somewhere here about the needle valve falling apart and causing a lean condition.

Hi. Might be nothing to do with yours but my 06 300 had the same fault and it turned out to be the pipe in the carb that links The 2 over flows together. It pushes on a pipe on one side, goes under the air inlet then onto a pre at the other side. It is meant to be split not a complete pipe. Is the bike new to you. Just something to check.

Hope this helps.