Officially my first post, but I've been lurking for about a month, just gathering info and seeing what's up. I've gotta give props to RedRider and say thanks for the community, it's nice having a collection of people who love the bike that I do. :-*
So, initially I saw RR's pipe and wanted to do something along those lines. I yanked my stock pipe, whipped out my plasma cutter and went to town. I gutted the entire pipe, knocked about 8" off the total length, and took out the secondary "cat". I took some of the mesh "baffles" and re-installed them to keep the noise at somewhat reasonable level, but otherwise there was no restriction. I opened the outlet side of the pipe up to the inlet size, and ran that for the better part of 1500 miles. Exhausts are my vice... I never leave them alone, so with that being said, I started on my second and third slip-on. ;D
I used a stock Yamaha Banshee pipe for my next pipes. Both of my Banshee pipes are full length, full diameter. The first pipe, I cut out the three-pipes-through-a-bulkhead design that the pipes had stock, but left the "turbine" at the end. It's hard to explain, but basically has a cone in the center that forces the exhaust around a series of thin plates, set at an angle and twisted, forcing the exhaust to spiral out... The pipe sounded decent to say the least. It had a nice low exhaust note at idle, and at my normal cruising speed of 60mph/8250rpm, I couldn't even hear it, which was nice. But, put your hand behind the outlet and you could feel how congested the whole system was... So, I had to change that.
Bring on pipe numero tres. This time I gutted the entire pipe, so I just had a tube. My friend had a perforated core from his BigGun exhaust on his yfz450 that had rusted and blown out, and it was the correct length. I fabbed up and entrance and exit cone, so that the core would locate itself, changed the inlet location, and blew the outlet up to 2". After fighting with the pipe and the fiberglass packing, it was all put together and looking cool. 8) It sounds friggin mean. My friends all agree that it's the best sounding pipe I've made. It is loud, but not obnoxiously. It has a very deep and bassy sound to it... Crack the throttle in a garage and you can feel your chest thump.
So far, I have a grand total of... $0 invested in my exhausts. The first pipe is still chrome, the second is blasted with some
very high temp paint (that stuff is a joke... my exhaust roasted right through it), and the third is still in it's bare state. Over the winter I'm going to have both of the Banshee pipes Jet Hot coated. Also over the winter I'm going to do my own take on the undertail exhaust kit... hehe.