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  1. #1
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    44mm on a 780 I need jetting input please

    Anyone running 44's on a 780, please post your carb jetting. I need to get a general idea of where to start with mine. Thanks


  2. #2
    Water Bum Rodneyae's Avatar
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    On my General project, I went with the stock jetting for a PRO and it has worked well for me. It is a tad rich but I like a little rich vs a little lean.

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    OK, what are the Pro specs you are running?

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    Moderator beerdart's Avatar
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    2000 PRO 785.
    Mains 155M 150C 155PTO
    Lows 105
    High Speed Screw 0 turns
    Low Speed Screw 1 turn
    Pop-Off 15-18 80g Spring.

  5. #5

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    you have to make surewhat year your carbs are to figure out what jets you need .97 had two different jetting specs ,98 was different i think and 99-00 where what beerdart listed . with the carbs off flip them over and just below the butterflys count the little hole there should be 2 for older carbs and three for the 99-00

  6. #6
    SeaLion's Avatar
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    xlint, still haven't been to the river pad in weeks so I have no access to my carbs and much worse, I haven't been in the water for more than a month. Something has been planned for every weekend so far so no chance to get to the skis yet. The info beerdart posted is fairly close though. I ended up a little richer on my lows than the stock Pro carbs. I want to say 110 or 115 max. I have the Boyesen Rad Valves so the lows need to supply a little more fuel. With stock reeds, the 105 lows would probably be fine. I know I kept the springs, and N&S stock. The highs might be a little different too. This is actually a good starting point as my location and atmospheric conditions are way different than yours anyway. I must have gotten the 99-00 set because those numbers sure sound familiar.

  7. #7

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    just checked and 98-00 carbs take the same jetting mag 155, cen 150 ,pto 155 and the lows are 105 . if there 97 carbs they had two different jet sizes mag 180 ,cen 175 ,pto 180 ,lows 82.5 or mag 170 ,cen 165 ,pto 170 and lows 85 .

  8. #8
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    WOW those are some thirsty carbs!!!! I was really curious to see what SL had, but knew he wasn't able to access his ski readily. Since he was running a single dry pipe already. And those specs are for triples, but thanks for the help guys, at least I have a starting point. Unfortunately I don't have 105 lows currently. Placing an order tomorrow. Good looking out for a brother.

  9. #9
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by 785 lugs View Post
    you have to make surewhat year your carbs are to figure out what jets you need .97 had two different jetting specs ,98 was different i think and 99-00 where what beerdart listed . with the carbs off flip them over and just below the butterflys count the little hole there should be 2 for older carbs and three for the 99-00
    Mine only have 1 hole in them, 2 if you count the hole in the butterfly plate.

  10. #10

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    Quote Originally Posted by 785 lugs View Post
    you have to make surewhat year your carbs are to figure out what jets you need .97 had two different jetting specs ,98 was different i think and 99-00 where what beerdart listed . with the carbs off flip them over and just below the butterflys count the little hole there should be 2 for older carbs and three for the 99-00

    my bad you have to open the butterflies to see the little holes

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