I was going over the yamaha eccessory web page and I ran into a bit of confusion on adding the quiet core insert to get the exhuast under 96db for trail riding.
this is for the '12 wr450
On this page it has a part number for the insert listed to make the exhaust 95.5db. It says"
". 95.5 dBA with QuietCore™ Spark Arrestor Insert (33D-E46C0-T0-00), sold separately."
However when you go to the page that has the insert. it says:
"Sound level is 95 dBA on 250 models and 97 dBA on 450 models.
So, I'm not sure if this combination will even make the bike trail compliant or not. There is this insert but has no real details.
Any help would be appreciated.
Edited by Ride-n-Hard, July 01, 2013 - 12:12 PM.