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  1. #1
    I transcend race Hombre! TBone14's Avatar
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    Carb Tuning HELP on Hurricane

    I spent a little time tuning the carbs on the Hurricane yesterday, and got it running better, but not great....

    Here is what has been done:

    - 40mm carbs w/accel pump
    - vforce reeds
    - shortened exhaust pipe
    - hotseat waterbox
    - 87mm nozzle bore
    - 12/17 impeller

    I am running 62 low, 35 mid, and 140 high jets...

    Here are the symptoms:

    - started at 1-1/2 turns out on both and it was really blubbery at low end
    - turned 1/8 in and got better, but still not an arm jerker by any means

    Wierd stuff:

    - idle with the hood up and down is different (idle raises with hood down)
    - when I let off of the throttle, it is really slow to rev down


    I'm thinking I might have an air leak, and/or accel pump with a leaky check valve.

    I plan on checking piston wash this week - any thoughts?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Sounds like your throttle cable is binding. On the Hurricane the throttle cable sleeve is very long so there is more internal cable friction.

    See if you can force some lubricant down inside the cable sleeve.

  3. #3
    johnsonmtz's Avatar
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    Quote Originally Posted by K447 View Post
    Sounds like your throttle cable is binding.
    See if you can force some lubricant down inside the cable sleeve.
    That's what I was thinking too.

    At this point you know that 1 3/8 out is too rich because it's blubbering.
    Turn your adjusters way down to something like 1/2 turn out. Does the ski now die when you punch the throttle? If yes, turn out 1/8 and and keep trying this until you get punch coming off idle. The sweet spot is going to be somewhere between 1/2 and 1 3/8.

    KJ

  4. #4
    casey67's Avatar
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    How did it run with the stock pipe and stock carbs ?

  5. #5
    I transcend race Hombre! TBone14's Avatar
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    Quote Originally Posted by casey67 View Post
    How did it run with the stock pipe and stock carbs ?
    Never ran it in stock trim...

    I know that is what we typically recommend: get it running well stock and then start playing, but I built this one from a hull and didn't want to be installing and then re-installing.

    There was also quite a bit of information concerning similar Hurricane builds.....so I figured I'd give it a shot

  6. #6
    I transcend race Hombre! TBone14's Avatar
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    Quote Originally Posted by K447 View Post
    Sounds like your throttle cable is binding. On the Hurricane the throttle cable sleeve is very long so there is more internal cable friction.

    See if you can force some lubricant down inside the cable sleeve.
    Good thought, I'll check that tonight....seems like the throttle lever is springing back fine, though.

  7. #7
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    the virage runs 65 lows,35 mids,140 mains,1 1/2 turns out.runs almost perfect like this

  8. #8
    Is there a little bit of free play in your throttle cable when it is in the idle position?

  9. #9
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    Also check where the cable screws into the throttle block. You can hardly see it with the stock handle bar cover. Mine fell out early in the season.

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