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  1. #1

    Tunnel reinforcement why

    I have read several posts regarding reinforcement of the pump tunnnel on several models. Pardon my ignorance but why is it necessary to do this?


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  3. #3
    fenn's Avatar
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    because your pump tunnel will crack and your ski will sink and become an artificial reef for the fish to swim in and the crabs move in to

  4. #4
    Cheers for the replies.

    Can someone please tell me the purpose of the yelow piping attached to the exhaust in this photo. http://www.wfoperformance.net/galler...ll2007/034.JPG

    Prob WFO is the best to answer as it is from his site.

  5. #5
    fenn's Avatar
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    the yellow tubing is h/d tubing. in the picture its being used for the jetworks holeshot mod. improves acceleration

  6. #6
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by fenn View Post
    the yellow tubing is h/d tubing. in the picture its being used for the jetworks holeshot mod. improves acceleration
    Quote Originally Posted by steelroe View Post
    Cheers for the replies.

    Can someone please tell me the purpose of the yelow piping attached to the exhaust in this photo. http://www.wfoperformance.net/galler...ll2007/034.JPG

    Prob WFO is the best to answer as it is from his site.
    yes, do a search for Jetworks mod

    there are a couple threads in the Yamaha how to do section

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