Getting ready to ride at a ride park and have a couple questions.I am almost positive it does, but does a bone stock 2007 400ex have a USFS approved spark arrestor on it already.And does anyone know how many decibals they are.The park is limited to 94 db at half throttle.Thanks!

 

Yes, it should have one in there. and stock exhaust hits about 93db.

 

I didn't even think it was 93db.....but you could be right..... I thought it was closer to like 88 or something.....

 

88 db is what i have been able to find online.

 

You can whisper and still hear yourself. I had my '08 tested and it was 88.2 db's.

 

That was a guess, I know that most stock pipes on quads are 93 or less.

 

When it's running or not?