- Aug 20, 2014
I have two 850 commando mk ones at the moment. One on balanced headers and one without. One has Emgo peashooters, the other on no-name peashooters. Other than a webcam #12 in the balanced header bike they are standard in terms of anything relating to the exhaust note. The balanced bike is definitely quieter, and crucially to my ears, a much nicer exhaust note, throughout the rev range. It doesn't lose any of the lovely character, just takes the harshness off. Subjective but everyone who has listened to both, agrees. It's also noticeably stronger in the midrange though that could just be the cam? Swapping peashooters makes no difference. Webcam would make engine note harsher if anything?Maybe, but for me the results were conclusive enough to ditch the ever cracking balance pipes.
I believe Norton introduced the balance pipe together with the quieter bean can silencers.
My test was with open peashooters.
baz: the sound changed, but quiter ? .. hard to tell while riding the bike.
Anyway, it is all a long time ago. Still have that pipe lying around somewhere.
If worntorn likes to repeat the test, he can have it..
This is also my experience with Triumphs. My '68 bonnevilles is noticeably harsher (to the point of not sounding that nice imho) than my brother' s balanced trophy which sounds just lovely. Both identical mufflers and 650 engines.
Cracked headers? Copper grease the balance pipe joints and don't tighten one to take out the stress?
Just a noise law mod? Clearly people who say that know more than Doug Hele who fitted them to the Daytona winning 500 racers!