may service na ganyan. de-carbonizing yata tawag dun.

nag-DIY lang ako. i just used water. fed it thru the pipe, tinakpan ng basahan (dapat may nakahawak), rev ng malakas, bigla mong alisin yun basahan. the water & carbon was blasted up to 20 ft. did this 3 times yata in one sitting.

so far, no problems with the muffler.

depende rin siguro sa type of muffler. mayroon kasing may glass or fiberglass sa loob. yung iba may foam yata or some kind of filter material.

but i'm not suggesting you do this procedure... baka sisihin nyo pa ako!