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Discussion Starter #1
Has anyone Not removed the Db Silencer in the AKRAPOVIC rear muffler or Not inserted the Slick Mode Enabling Plug?
 

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Discussion Starter #3
Installing the Enabling Plug made a big difference to the HP4, but removing the Db Killer likely only increased the power one or two HP.

What removing the Db Killer did do is give the HP4 a great exhaust sound.

Driving in Downtown Vancouver, BC without the DB Killer, I try to keep my RPMs and exhaust noise low by being careful on the throttle and shifting into 2nd quickly.
 

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DB Killer

One of our favorite tracks to ride has a DB limit.
103 db at 50 feet Or you are given the Meatball flag.
And you have ONE opportunity to be compliant.

Besides we're riding RR bikes not Harley's.
 
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