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quadrider60
12-21-2004, 03:37 PM
what is the stock exhaust db level on a 400
JRP
12-21-2004, 03:44 PM
i think like 90-91. not 2 sure. jus a guess.
dirt308
12-21-2004, 04:04 PM
Its in one of the dirtwheels issues. I think its like 88 or something.
jmpulse
12-21-2004, 10:57 PM
Stock is in the mid 80's dB.
400EX QUADER
12-22-2004, 11:13 AM
87!!
throwinitup
12-22-2004, 12:29 PM
not loud enough :devil:
quadrider60
12-22-2004, 07:00 PM
ok its 88db acording to dirtwheels
397ccEX
12-27-2004, 11:41 AM
It is 88 decibals!

http://www.dirtwheelsmag.com/detail.asp?id=181
muddy400EX
12-30-2004, 10:31 AM
Originally posted by throwinitup
not loud enough :devil:

i agree:D
Joe400ex
03-31-2005, 12:58 AM
what do u think mine is ai without a quiet core

LRD Full Stystem:devil:
Joe400ex
03-31-2005, 11:13 AM
i wanted to go to Ciffs this weekend,but u need a sparkarrester and the db has to be max 96,do they do the test at idol:confused: