In reality I've known it for a long while, if I want to make serious power, the headers have to be equal length, but up to now I was kind of lacking the bright idea on how to package everything as I wanted the whole setup to be as stealthy as possible.
Now building an exhaust strictly for my own use allows me to play around with certain aspects, whereas when I do one for someone else, well it has to be spot on.
One of the things that has annoyed me a lot was the retaining rings fixing the initial bit of the downtube to the head as the two-part construction would shift during initial fit up and is actually a lot of work to do. So I came up with a new idea of one-piece retainers, which I do have to machine on the lathe in order to have the downtubes go in. On the up-side: Both sides are perfectly parallel and the seal to the head is better.
With these sorted, which didn't take as long as I dreaded, but in reality just means I substitute weld time with lathe time. So I guess, this may become an option down the line. Welding them on works really nice though, even though I have to admit that the mandrel bends I used are actually really, really egg-shaped.
|This is actually the finished product and it's not quite in chronological order|
From there onwards it was *just* a matter of joining all the bits and actually building an exhaust.
1) go through the frame
2) go round the swingarm
3) clear the centre-stand
4) be of equal length as the front-downtube
And with those headers being sorted, it was down to the tube going to the second Y and then the splitter to the exhausts.
And that's what it sounds like on the bike (before sync'ing the carbs):