lloydstrans said:I used to tune bikes in my garage at night and came to the conclusion that bikes that make more noise only do that well. A 105 decibel bike will run a 15 second quarter mile, a 110 decibel bike will run a 20 second quarter mile. My vacuum cleaner bike will run a 11.23 all day. Moral of the story loud butt poo only gives the appearance of going fast.
Average amateur bike tuner doesn't know about standing exhaust pressure and charge loss. Loud pipes generally cost the meat of your lower end power, on import cars too mostly