slasherzzz,
Can you do a couple of things:
1. Check the fuel filter in the tank and see if it looks dirty. If so replace it.
2. Check the muffler because they usually have a spark arrester and tend to get blocked up if so clean the mesh with a wire brush.
3. Also check the exhaust port for blockage (carbon) and if it is has a carbon build up clean it out.
4. If you are using a champion spark plug then change to NGK as well.
Let us know what happens and if this does not fix your problem then get back to us for more information.
