18 years ago
I have a rough idea of the principles involved from years of messing
about with old 2 stroke bikes when younger and appreciate that if I
restrict the exhaust too much I will lose power.
Are there any scientific principles to apply?
I guess quite a few people will have made and fitted quieter exhausts
to their engines for showing, or is the general concensus "thats how
loud it was when new so leave it alone"