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Thread: Viper clutch

  1. #1
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    Viper clutch

    Anyone have any info on viper clutches? Will the accept bully drivers? Thinking of purchasing a 2 disc . Always like more bang for buck.

  2. #2
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    The Viper drums are the industry standard "Small Pattern", which is same as currently available Buller brand sprockets.

  3. #3
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    The viper was built by Ward Karting many years ago.
    It's been out of production for years

  4. #4
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    Unfortunately the name was recycled about three years ago and used on a new line of clutches.

    Mike Ward, being the stand up guy he is, didn't complain and simply renamed his original version when he started making parts again recently.

    The "current" VIPER is built from the base design introduced by Tim Baker about 16 years ago, and marketed under various names by most every top clutch builder in the USA.

    The Baker design is easily the #2 selling clutch in the country right now. Parts are readily available at practically every kart shop in the lower 48. And as said before, the support for the "Viper" and its fellow clutches is out there daily.

    An absolute bargain for a piece that gets the job done.

    As one of the builders puts in his press release......from Putt Putts in Iowa to a $10K race in the Heart of Dixie, the "insert name here" gets the job done.

  5. #5
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    Quote Originally Posted by bhill View Post
    Anyone have any info on viper clutches? Will the accept bully drivers? Thinking of purchasing a 2 disc . Always like more bang for buck.
    Do you know where I can find a spring height chart for this design?
    Last edited by Jenkin; 12-21-2018 at 01:32 PM. Reason: Misspelling

  6. #6
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    Are you using the Gold .085" wire springs, or the silver .090" wire springs ??

  7. #7
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    Black .090

  8. #8
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    Hopefully someone has re-painted/coated the springs because if you have a black Bully spring, it will not work right in these clutches without some serious modifications. Check the length of the spring and get back with us. Mike Curry can get you hooked up on all the info you ever need on this style clutch. FWIW, I've never seen a spring height and weight recommendation for engagement rpm chart for these clutches. I would imagine someone that sells them under their brand name would provide this info publicly.


    -----
    Thanks and God bless,
    Brian Carlson
    Carlson Racing Engines
    Vector Cutz
    www.CarlsonMotorsports.com
    Carlson Motorsports on Facebook
    29 years of service to the karting industry
    Linden, IN
    765-339-4407
    bcarlson@CarlsonMotorsports.com

  9. #9
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    Some people paint the springs. With the OC/Gator/Viper being the second best selling platform, there are many builders doing their own thing for product recognition.

    The gold .085" wire springs are the only ones I have made a chart for, as there are very few people using them. I can email that to anyone who needs it.

    The standard .090" wire spring as supplied is a raw steel/silver in appearance. It is noticeably longer than a Bully spring, which is one of the main keys to the clutch working properly.

    When Tim Baker first designed the clutch, we used the Yellow spring from the Horstman enduro axle clutch as this removed any sensitivity to air gap from the clutch. A Viper style clutch will still work even if the air gap is as tight as .020" or as loose as .060"
    A good starting point for 3800 rpm on a stock clone is .430" using a Bully brand spring height gauge.

    The spring is fairly linear so a .020" change in height is "about" 200 rpm. Above .450" it is less than 200, and below .380" it is slightly more than 200rpm.

    Depending on lever style, as there are about 12 different lever style available, that is a good guideline to follow.

    Shannon Halbert and James Raines use a different style retainer than I am familiar with, so if they built your clutch, you may need to contact them to get a good ballpark height to start with.

    The main thing to keep in mind, is make sure springs are from same batch (or matched) and that you are consistant in your settings. Buy a Bully brand spring height gauge, and check it often with the supplied calibration ring.

  10. #10
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    And as Brian pointed out, a Black, Red, or Blue Bully brand spring is not ideal for use in a OC style clutch.

    If you are running a Jackshaft setup, or are looking for a really low stall, the Purple .067" wire Bully spring works fine, as it utilizes the same engineering as a OC style spring.

  11. #11
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    The springs themselves are different lengths (Bully to OC style.) Bully uses .500" length springs, while the OC style clutches use .600." I hope I am correct on that. As Mike said, they are considerably different when held side by side, but to the untrained eye, if you were to only look at one, you may not notice the difference in length.

    Also, when measuring wire diameter on a spring, check it in the middle of the spring and consider the thickness of the powder coating (or whatever color method was used.) zinc, chromium, nickel plating, etc will add very little to the wire diameter dimension, while powder coating can add enough to make you think it's the next wire size (ie .086" - .091.")

    Thanks Mike, for offering your chart on the gold springs.
    Much appreciated!
    Hopefully others will follow your lead.

  12. #12
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    Aug 2017
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    10
    Michael curry could you email me the spring height chart for the gold springs. thank you wickedfastmotorsports@gmail.com

  13. #13
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    Email has been sent

  14. #14
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    Atlanta GA
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    Michael could you please send me the gold spring chart as well? Thanks! mbrianpowers@gmail.com

  15. #15
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    Jenkin,

    Email has been sent.

    Mike

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