If this is something that happened suddenly, most likely cause after you check the air filter for being plugged is the cylinder head, more than likely you have broke valves in the head, need to remove the head and inspect the valves in the plate, most are non serviceable and require new head plate and gaskets, also a good idea to look at piston tops for any damage as well.
Answers & Comments
If this is something that happened suddenly, most likely cause after you check the air filter for being plugged is the cylinder head, more than likely you have broke valves in the head, need to remove the head and inspect the valves in the plate, most are non serviceable and require new head plate and gaskets, also a good idea to look at piston tops for any damage as well.