1) Remove the four 5 x 8 mm tapping screws from the upper muffler protector.
2) Remove the upper muffler protector.
3) Remove the 4 x 8 mm screw and spark arrester.
Be careful not to damage the wire mesh of the spark arrester.
4) Check the carbon deposits around the exhaust port and spark arrester. Clean, if necessary.
Replace the spark arrester if there are any breaks or tears.
5) Install the spark arrester and upper muffler protector in the reverse order of removal.
