Hi,
The bike is a '03 gas gas pro 280 with a dellorto carb. For a while now I'm suffering with the fuel pilot jet blocking, to start with I was getting hunting revs then would clear with a blast so a fuel filter was added.
Now I'm having trouble starting from cold unless I blow out this jet, you can see through the centre that it's blocking, once running it's ok now. What would be the process to find and eliminate what's causing this to block up?
No signs of contaminants in float bowl or lines.
Thanks in advance