Along with my Thunderbird sport I also have a gsxr track bike. It needs quietening down a couple of db's! There is a removable baffle in the can, but with no wrap around it, just a perforated metal tube. Is it as simple as wrapping a bit of baffle wrap around this, to reduce the noise?
The space between the tube and the can should be stuffed with silencer wadding. It will make it quieter.
In a word yes @dirty big hands longer response.... A mate recently purchased a new can for his 675 str. Straight through with an exit diameter of about 80mm was just ridiculous in noise levels. We made a baffle up and that knocked the edge off but not enough. I had some spare new offcuts of "cotton wool" baffle sheet used for my last 2 stroke silencer repacking job. He wrapped the new baffle with the wadding and I'd advised him to wrap stainless locking wire around the wadding for ease of placing and removing the baffle which he did. You certainly wouldn't class it as too quiet now but it solved the issue and made it acceptable in my opinion for road use. Note. When he hit the rev limiter in about 3rd the other day in front of me I could clearly hear it above my str with twin Arrow cans on
@dirty big hands try something like this https://www.ebay.co.uk/itm/Exhaust-...p2349624.m46890.l6249&mkrid=710-127635-2958-0
So..... I wrapped the baffle. And using a db meter on my phone before and after, it's taken just over 3db off.
3db is quite a lot if those numbers are reliable 10db if I remember correctly is twice the volume (energy) its a strange logarithmic scale which takes some understanding to reality values
It might not be the true decibels, but hopefully the 3db drop is accurate. Isn't it something like 11db is twice as load as 10db, not 20db (10 doubled)??? Either way, the bike tested at 101db (just) last track day, but the people who have bought new houses next to 100 year old airfields complain about noise.... so the sound level is getting stricter, hence the need to quieten it down a bit.
