Exhaust baffles

Discussion in 'Engine, Fuel and Exhaust' started by mbrown, Oct 16, 2008.

  1. mbrown

    mbrown Member

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    I just installed a set of drag pipes on my 91 Softail and noticed that you can buy baffles. Stupid question but how are these installed? Most seem to have 1 screw at the end and I have no idea where these attach. Thanks for your help.
     
  2. nupicasso

    nupicasso Member

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    If there isn't a hole already...you'll need to drill one near the exit end of the pipe... somewhere around 2 inches from the end on the part of the pipe facing your motorcycle(so it doesn't show)
     
  3. mbrown

    mbrown Member

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    Any advantage to shorter vs longer baffles?
     
  4. nupicasso

    nupicasso Member

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    I believe the deeper in they go the more they can muffle the sound...but I'm not completely certain.
     
  5. NEWHD74FAN

    NEWHD74FAN Experienced Member Retired Moderators

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    Easiest solution is to measure the inner diameter of the straight portion of the pipes you want to use, typically range between 1 7/8" to 2 1/4" or if the hollowed out muffler end 2 1/4 to 4 " and order replacement baffles of the correct diameter, which range in price from $13.00 to >$80.00 for pair. It will be really hard to find the "sound" you want, but it will make the straight pipes more quiet, poor low end performance & de-accel problems will probably reduce or stop if you were experiencing this running straight pipes. :newsmile093:

    You will have to drill a relatively inconspicuous hole in both pipes to bolt in the baffles, approx. 3-6" back from the opening using power center punch, short drill w/90 deg drill motor, lots of patience, magnetic long screwdriver and tape to get the bolt to line up & all the way thru, tighten the lockwasher & nut on the outside. Did I remember to say be patient?...Trust me, be cool...you will be fine. :newsmile04:

    Check if you have a partial Stage I mod/setup, you may want to complete the rest, i.e. if the air cleaner is not stock, you definitely need to check if carb has been rejetted, the needle raised w/ #4 washer, idle mixture plug removed and adjusted 1 1/2 to 2 turns from seated following Gliders' & Hobbit's Tips regarding stage I mods. To check how you've done, complete doing fresh spark plug inspections/power "chops" to make sure all is well. Running lean with a partial Stage I is bad news for the longevity of the motor. Good Luck. :)
     
    Last edited: Oct 18, 2008