This is the custom exhaust I just put on my bike. It starts at the stock size and steps up 3 times to 1 1/2" ID. It has a 12" drag baffle, which didn't baffle much. So I put the restrictor plate at the end and that quited it down a lot, but it is still a little too loud. I could get by with it but eventually I will make a baffle of my own for a better sound level.
As for power? Yes, more power but less smoothness. The power is worth it and I am expecting a better carb to smooth it out.
Here is the Video on Myspace. You can also check out the 3 Supras a freind and I built up a couple summers ago.
Brett's Bobber Bike Video by Big Daddy - MySpace Video
Since my last post I have upgraded the plug and wire. It made a noticable difference. I started using high end synthetic oil, a huge improvement. I replace the inner sleave of my throttle with a mini bike throttle sleave. Upgraded the clutch actuator, this is a great part and worth every penny they cost. The chain tensioner has been upgraded to a sprocket style with bearings and a size 41 chain. I upgraded the fuel filter and fuel petcock. This helped with the constant high rpm fuel starvation I was having but it hasn't cured it. I guess the carb simply can't keep up and I am going to order a better one next week.