Hi guys I have a 2013 txt pro 300 the issue I'm having is I'm going through spark plugs like every month and when I take them out they are full of carbon. I was wandering if the carb is set up right as I'm running the fuel oil mixture to what gasgas recommend and can o my think that the carb is dragging in to much fuel?? Any help would be great thanks

Air filter clean?

Yea air filter is fine bike always runs fine when I'm using it then dies out won't kick back up until I change plug

Rich mixture will kill the plug.

If it comes out really black or your mixture is too rich, too much oil, bad ignition (but you should notice this)

Edited April 1, 201610 yr by crazybond700

Sounds like it could be a choke circuit problem. Dell Orto?

Cold start enrichment system (often called choke), float valve and float level would be my first checks, after air filter.

 

What grade of plug?

 

What oil ratio and what type of oil?

Hi I'm using pj1 smokeless oil and ratio is 75ml to 5litres of fuel

Cold start enrichment system lever position sometimes can be the problem if this bike is new to you. It has to sit just right or it is partially open.

Yes, its sounds like it is running too rich.  In addition to previous suggestions, check your low speed mixture screw.  In most carbs it is an air screw so turning the screw out would make the mixture more lean.  I think Del Orto uses a fuel screw so turning the screw out will make more rich. 

 

FYI, I always carry a spare plug and tool to change it along the trail.  Yes, even with my 4RT.