Noise limits?

[Corse1]

Bollocks - make up some noise reducers and pop them oin the outlet end. You'll only need to reduce the outlet hole 25% to knock mack the noise a lot. Bet you notice no loss of power at all.

I have made them for std mufflers. 999 has two obround outlets that are a little more difficult to make DB killers for. Of course I could make them but wanted to get a little insight into those that have experience

[AllanB]

I can remember going to a oldies race at Cust years back. Old race bikes on a dirt track with open megaphone exhausts fatting around in anger. Pretty sure I permanently lost some of my hearing that day.

[Edbear]

I can remember going to a oldies race at Cust years back. Old race bikes on a dirt track with open megaphone exhausts fatting around in anger. Pretty sure I permanently lost some of my hearing that day.

The best part of owning my old BSA B31 was having it WOT in 2nd powering, (!), up Bank St. in Warkworth, the gutted Dunstall megaphone rattling the windows and probably the nerves.

[CHOPPA]

Bollocks - make up some noise reducers and pop them oin the outlet end. You'll only need to reduce the outlet hole 25% to knock mack the noise a lot. Bet you notice no loss of power at all.

Doesnt work. We put an insert that came with an arrow pipe that cut the outlet to around 50%. The bike was slow and even though it sounded quieter it was actually louder on the db meter. Its a tough rule to follow as you cant do your own testing for it at home and even at practice days your bike may be well under the limit but cloud cover can drastically increase your reading, even a back fire or ping from a quick shifter or traction control can spike the reading. Its sound pressure too so a 125 may be ear piercing but it doesnt have a lot of sound pressure while a superbike may not sound as loud but there is a lot of pressure.