fit 2 into 1 exhausts to their Morinis. These always sound wrong to
me and whilst they boost low end torque it seems to be at the expence
of top end power.
Alex at NLM
had experimented with an Excalibur exhaust on his 501 engined
Valentini. This gave both low end torque and top end power, but
negated the use of a centre stand, had poor gound clearance and is a
very tight fit in the frame. It wraps around behind the rear
cylinder, putting both pipes on the right had side of the bike. This
is presumably to copy Harley styling cues.
that he could use a Valentini style pipe on the rear cylinder to
solve a lot of these problems and also the use of 'Dairy piping' as a
cheap source of high quality stainless steel tubing. The resulting
exhaust was a success and I put myself on the waiting list for a copy.