Quite round town not so quite wot
Still playing with my muffler. with 3 discs noise was about 92 dba at 4500rpm (94 being legal limit) but after a day of riding the noise dropped more it lost power and the front pipe when blue. so i tried 5 discs again (too loud) so not wanting a repeat problem I have gone to 4 discs (94dba) and made a back press regulator (pop off valve) which starts to open 6000rpm with no load. the trumpet does nothing its a shoot measure (i got it from a opp shop today I was looking for something stainless to use) and the base is the valve. I have cut the trumpet off, maybe it will become part of a ram tube.
Still playing with my muffler. with 3 discs noise was about 92 dba at 4500rpm (94 being legal limit) but after a day of riding the noise dropped more it lost power and the front pipe when blue. so i tried 5 discs again (too loud) so not wanting a repeat problem I have gone to 4 discs (94dba) and made a back press regulator (pop off valve) which starts to open 6000rpm with no load. the trumpet does nothing its a shoot measure (i got it from a opp shop today I was looking for something stainless to use) and the base is the valve. I have cut the trumpet off, maybe it will become part of a ram tube.