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Thread: What if?

  1. #1
    Senior Member Woodi23's Avatar
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    What if I take off the back of my exhaust? How would that affect my motor? I would be taking off the spark arrestor and just leaving that back part open, how would that affect things?
    2010 TW - Easton bars & clamps, cyclerack (black), jimbo shield, acerbis steel gaurds, atv seat pad, custom skid plat, more upgrades soon

  2. #2
    Senior Member iowatdub's Avatar
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    Im pretty sure it would be louder. Oh, and i think you may want to rejet the carb or at least adjust it.
    2008 TDUB

  3. #3
    Senior Member n2o2diver's Avatar
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    Why? Why would you want to do that?
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  5. #4
    Senior Member srs713's Avatar
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    Removing the spark arrester and end cap would reduce the back pressure in the exhaust system. That would make the engine run leaner.



    If your carburetor is stock, it is already running the engine lean. Adding those together would raise the temperature of the motor to dangerous levels.



    There is a recent thread with a picture of a piston that was run too lean. Nice big hole in it.



    But hey... it's your bike, not mine.

    Stephen S.

    '07 TW200:

    15/50 sprockets, O-ring chain, D2Moto foot pegs

    tweaked carb (127.5 jet, 0.019 needle shim, idle screw @2.25),

    Rubbermaid "Action Packer" on homemade brackets

  6. #5
    Senior Member PalmStateCrawler's Avatar
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    Quote Originally Posted by n2o2diver View Post
    Why? Why would you want to do that?
    My question exactly? What are you hoping to achieve?
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
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    '10 TW200 you will be missed

  7. #6
    Senior Member pgilles's Avatar
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    Some bikes it makes a difference, but on the TW it doesn't. It'll give you noise without the need to spend $300 like others have on aftermarket mufflers.



    The only "uncorking" that helps the TW is jetting (even with stock exhaust) and a little intake opening.
    Sold bike.



    Youtube vids of old TW's acceleration:

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  8. #7
    Member 2goose's Avatar
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    Quote Originally Posted by pmtg View Post
    Some bikes it makes a difference, but on the TW it doesn't. It'll give you noise without the need to spend $300 like others have on aftermarket mufflers.



    The only uncorking that helps the TW is jetting (even with stock exhaust) and a little intake opening.

  9. #8
    Member 2goose's Avatar
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    Doing so will accomplish the following, Increase in noise, decrease in bottom end torque and horsepower, probable decrease in mid-range and top end unless you rejet the carb.

  10. #9
    Senior Member Woodi23's Avatar
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    I am just wondering if I open it up and do nothing to carb, if it would hurt the motor? I really do like the sound in town, so cars can better hear me coming.
    2010 TW - Easton bars & clamps, cyclerack (black), jimbo shield, acerbis steel gaurds, atv seat pad, custom skid plat, more upgrades soon

  11. #10
    Senior Member pgilles's Avatar
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    Quote Originally Posted by Woodward View Post
    I am just wondering if I open it up and do nothing to carb, if it would hurt the motor? I really do like the sound in town, so cars can better hear me coming.


    You should be fine. BUT I would highly suggest you rejet, for a couple reasons...

    1) to help keep the the engine cooler

    2) it's more fun to drive, and

    3) you asked for more power here: https://tw200forum.com/index.php?/top...778#entry57778
    Sold bike.



    Youtube vids of old TW's acceleration:

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