ORIGINAL: GreaTOne_65
Right now, all I'm running is a Pitts style muffler. From what I have seen, from other engines on cans, if the Brison saw the same improvement, I believe it would be a real monster. What it really boils down to is the port timing, I have never measured it to know how it's timed.
My setup a few years ago was a Brison 3.2 on a KS 1060 tuned pipe. I had the header custom made, and I think it was between 12 and 13 inches in length. I picked up close to 400 rpms over my JA peacemaker pitts muffler.
I had this setup on a SD Yak that weighed about 18lbs. Rock and Roll 3D platform.
Oh. I used MSC 22x8 props, and NX 23x8 props.
Mine was blue in color with a CH mechanical advance ignition.