I put a silencer on this weekend. Seems to work good. Only had about a half mile on my machine but felt it needed some silencing. Found a site on the web where a DIY was made for the Honda Foreman so decided to give it a try myself. Actually was a fun little job. Ordered a Walker 22022 tractor muffler. Theres many others that look the same. Should cost you around 25-35 bucks delivered. Used a couple of copper 1 inch 90 degree fittings, a little steel, threaded rod, clamps, paint and powder coating. The hardest part was forming the inlet and outlet around the copper fittings. I cut extra slits and let the 1 1/8-1 1/4 muffler clamps do the work. The outlet is .880 I.D. I made it an easy take off and install.