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Thread: Pump Tunnel

  1. #1
    YamahaToys's Avatar
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    Pump Tunnel

    At what speed should you install the pump tunnel kit upper 70s or mid 70s?


  2. #2
    Happily Self-Employed WFO's Avatar
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    There have been some reports of low 70s GPRs cracking.

  3. #3
    One day at a time..... N8R's Avatar
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    i think it should be one of the first mods to do after Jims plate and a 1200 grate

  4. #4
    Duke's Avatar
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    Mine cracked at 72!

  5. #5
    Moderator RX951's Avatar
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    yup, this should be a must-do mod if you are going to mod your ski period.

    Its a bullet proofing mod I guess you would call it.

    a.k.a. preventative maintenance

  6. #6
    YamahaToys's Avatar
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    Thanks to everyone for the quick reply. The only question I have now is do I buy the kit or do it myself? Is there any difference in the "bullet proffing"

  7. #7
    DRC 4 LIFE TheDome's Avatar
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    Buy the kit. Don't you have a good friend that will help you with the install? If not I will for a small fee.. lol

  8. #8
    Low 70's and buy the kit.

  9. #9
    Its better to purchase the Carbon Fiber piece from R&D and use the 04+ OEM brackets. I have heard of 3 people that laid the fiberglass themselves and the tunnel eventually cracked. NOT WORTH THE HASSLE WHEN for a few $$$ more you can buy a proven part that works.

    While at it since you are already in there implement the use 04+ Ride Plate brackets as well if your ski is 03 or earlier model.

    Good Luck

  10. #10
    Moderator RX951's Avatar
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    Neither method is better over the other, the carbon fiber piece is great no doubt, it eliminates having to deal with resin and the work to lay it, but if you properly lay down the glass or carbon fiber properly, it will not come apart. It will be just are strong and will have direction adhesion with the tunnel.

    Where problems have occured with people using fiberglass, they just laid it over the tunnel and not apply it as one large peice to cover the bolt holes too.

    The key is laying the glass or carbon fiber around the tunnel and across the bolt holes so it is 1 uniform piece.

    And Like Fercho mentioned, use the updated brackets.

    I think the point here is to ensure you reinforce the tunnel in order to prevent it from cracking.
    Last edited by RX951; 01-22-2007 at 09:00 AM.

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