Problems at high speeds.

[tommyardin]

I am just wondering.
Has anyone ever cut through the 'link pipes' I.e. Small link pipes at base of down pipe that join 1-2 & 3-4 (obviously on a shagged set of pipes) to see if they are actually pipe or just solid bracing lugs that help stop flexing or vibration. Or if it is a piece of pipe/tube is there any holes in the down pipes to allow the bypass of gasses.
An FZS 600 boring along the road doing 10,000 rpm x 4 cylynders = 40,0000 piston strokes per minute, that equals 666 piston strokes per second (I know, it sounds impossible) and that every other upward piston motion is an exhaust stroke, that's one awful lot of exhaust gases howling through the downpipes is there any time or space for perhaps an 8 mm inside diameter or so link pipe to make any difference as the 1-2 & 3-4 will all be competing for exhaust space, especially as all four down tubes exit into a single collector before being forced into one single pipe as it leaves the front pipes and again being restricted by a baffle in the tail pipe.
Please excuse an old man's ramblings but it is something that has crossed my mind.  :rolleyes