Bobber Unknown Yamaha Honda Kawasaki Suzuki YZ250 CR250 KX250 Exhaust Pipe Silencer. I purchased this for a 2006 or 2008 Yamaha YZ250 a few years ago and it did not fit. I sold bike and still have this pipe muffler. There a couple dents dings scratches as seen in pics. I am selling for a Bobber Project type bike so you can customize it to fit. The measurements are on the small pipe center bolt hole to center bolt hole is 2 1/4" inches, and the inside diameter is 34mm and on side is 43mm at end opening of pipe where bolt up area is. The other opening of the small pipe is 42mm inside diameter and 46mm outside. The U part of small pipe from U to end measures 13" inches. Now the larger pipe muffler silencer measures 31-31 1/2" inches long and 4" inches wide and the bolt hole to other bolt hole measurement at a angle is 16 1/2" inches. The muffler silencer alone without pipe measures 17" inches. Now this may actually line up for a YZ250 but what exact year is unknown to me.