Tom, a year ago I looked at the ways of making more power. Bigger displacement was one. Spinning the motor faster was the other. More cubic inches looked like the best solution. There was a lot less stress on the engine if I could keep the rpm below 8,000.
The first few pages of the PipeMax printout is Imperial units. The last couple are in metric. I tossed the metric stuff. The answers to all of my questions were in the trash can on the last page just after the metric data. There were instructions on what to look for in all of the data.
Using PipeMax, the #813 cam with the ported head and the 2mm larger intake valves are plenty adequate for the 865cc engine. Then I entered the bigger bore size and compression of the 994cc engine. The cam, valves, and ports are adequate for this bigger motor, too. This is good news. I thought I would need a hotter cam, bigger valves, and other expensive stuff to go with the 994cc kit. Things I cannot afford. I do not need them and the kit is paid for. All I need to do is to install it. The big motor will be used in AUS. Definitely.
The cross-pipe at the 3rd harmonic makes the exhaust system work. Almost any non-restrictive muffler can be used, such as Norman Hide Toga's, Triumph Performance Predaters, etc. The British Custums "sleepers" have the best aerodynamics and I could get a deal on them, price wise. They are OK for racing where noise is not a factor. They are too loud for the street and the way they are mounted is kinda hokey. Triumph off-road mufflers with Triumph headers or the Arrow pipes and mufflers are what I use on the street. They work OK and are fairly quiet.