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How to swap out your Big Radius baffles

Discussion in 'How-To' started by Gas Man, Apr 10, 2007.

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  1. Gas Man

    Gas Man Cool isn't cheap
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    How to swap out your Big Radius baffles
    I was going thru my PB account and organizing it a bit...

    found more pics concerning the baffles...

    Here's what I have on the install of my Big City Thunder baffles

    heat shields off
    [​IMG]


    you can see the hole drilled for the BCTB
    [​IMG]

    Here you can see the stock baffle hole on the inside of the pipe facing the swingarm
    [​IMG]

    Stock on the top and BCTB on the bottom.. what a difference!!!
    [​IMG]
     
    #1 Gas Man, Apr 10, 2007
    Last edited: Apr 12, 2007
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  2. Gas Man

    Gas Man Cool isn't cheap
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    Stock
    [​IMG]

    BCTB
    [​IMG]


    No baffles
    [​IMG]

    BCTB installed
    [​IMG]
     
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  3. chucktx

    chucktx Well-Known Member

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    i have a question, are the washers adjustable or changable, to adjust backpressure??
    chuck
     
  4. Gas Man

    Gas Man Cool isn't cheap
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    No they aren't adjustable as they are welded in place. I'm sure if you felt like welding you could do your own thing with them.
     
  5. Gas Man

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  6. BIKERDAD61

    BIKERDAD61 Puddle Pusher

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    So How Do They Sound ???? Do The Cackle On Decel ?? I'm Running The Big Radius With No Baffles And The Sound Great But After 100 Miles It Gets A Little Annoying.
     
  7. Gas Man

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    It will sound almost exactly like the BR minus the baffles. But it will eliminate alot of the decel poping... of coarse with the proper tuning. If you check over on big dog owners group. I think there were a few selling them.
     
  8. omahabiker

    omahabiker Member

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    Chris,

    Just wanted to make sure I'm reading this correctly. So, you have to drill a new hole in the pipes to install the BCT Baffles?
     
  9. Gas Man

    Gas Man Cool isn't cheap
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    Yes with the back end of the baffle about 5-6" from the rear of the pipe.
     
  10. go4dave

    go4dave Member

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    hey GAS,,, did you do a dyno run before and after to see the effects on HP and TORQUE??
     
  11. BIG HOUSE

    BIG HOUSE DOG ONA DOG
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    I don't think he did but I'm sure he will ans 4 himself soon enough
     
  12. Gas Man

    Gas Man Cool isn't cheap
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    No... I never ran the dog on the dyno. I haven't finished F'in with it. Besides, its only a number. I know all about speed... remember House and I come from rockets.
     
  13. WB Cycles

    WB Cycles Well-Known Member

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    If you get bugs in your teeth ..... you're moving fast enough. :up:
     
  14. D boy

    D boy New Member

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    I started to do this mod untill I ran into a small problem. The baffels are stuck. :bang: Now what?
     
  15. pig pen

    pig pen Well-Known Member

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    I know there is a tool for pulling objects out ( slide hammer ) I think. Kinda like a dent puller.
     
  16. Vegas

    Vegas Well-Known Member

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    Spray it with penetrating oil and then use a slide hammer. I had to hammer the hell out of 1 to get it out.
     
  17. big orange

    big orange Member

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    I did'nt have a slide hammer so I took a pr. of needle nosed vice grips and locked them on to the baffle then was able to use a hammer & loosen them up then pulled them out but it took a little time.:)
     
  18. Gas Man

    Gas Man Cool isn't cheap
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    Yeah ask big house about it... they are a pain to get out!
     
  19. Vegas

    Vegas Well-Known Member

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    Never would have taken mine out. I had to slide hammer mine in a vice at least 20-30 times. Of course I waited until about 5000 miles.
     
  20. BubbleHead

    BubbleHead Big Dog Biker test account

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    Right On Nelson !!!!:2thumbs:
     
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