How many DB's

I looked too can't find rating. if you really want to know go to radio shack and buy a decibal meter for $35 and test your machine at around 3,000 rpm or if your state or county has sound regulation then find out what rpm they test for db's at if that's the reason you want to know. aftermarket pipes are going to be in the 90's -low hundreds. stock should be in the 80's-90's range. every atv made has different ratings and also how old the pipe is the decibals go up so just because yamaha tells you it's say 86 db's doesn't mean that that's what yours is. pipes get louder with age.