The muffler sets arrived from Hobby King yesterday. I couldn't play with them because my grandson visited. This morning I decided they could use a little shorting. They are sized for 50 to 60 cc cylinders so I decided to keep the same cylinder volumes for my 83 cc with 42 cc cylinders. I calculated the 60 cc volumes at 12, this allowed me to shorten the length by 3". I wanted to keep the back of the muffler away from the carbon fiber wing tube. I used a pipe cutter to score the tube and finish the cut with a Zona Saw. In the case of this muffler you get what you pay for. The mufflers are a dual chamber with one large volume, a single baffle into a 15mm outlet tube. Other brands might have 3 to 4 chambers with baffles and reversal. I'm happy with these however.
Last edited by Tony Hallo; 01-19-2015 at 08:53 AM.