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  1. #1
    cheatin' piston popper addicted's Avatar
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    bigger carbs = more rpms

    I've been at this for a while on my ski trying to properly jet gp1200 carbs on my raider.

    I got a chance to throw my PET2100 on a stock raider over the weekend. It was spinning 6500+/-

    I was testing a stock prop on my ski witch is almost perfectly jetted(just need to lower popoff, I think) and it was turning 6800+

    So there you have it, roughly 300 rpm's when you throw 44's off a gp1200 onto a raider 1100.


  2. #2
    cfgp927's Avatar
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    the only thing you need now is a larger fuel tank.....along with the increase in rpms you'll see an increase in fuel consumption....also a whole lot more smiling.
    mike

  3. #3
    Darthraider's Avatar
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    TJ, says that 48s are 7 hp better than 46s on a ported 1200.

  4. #4
    Duke's Avatar
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    I have always experienced good results with the larger carbs. Even put 48s on a stock 1200 and picked up everywhere.

  5. #5
    Dave Sharp dav_dman's Avatar
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    the 1100 fuel supply line is smaller diam.

    I hooked up to both reserve and the "on" line and tee'd into the carb fuel lines between the carbs..also ran a restrictor jet.

  6. #6
    cheatin' piston popper addicted's Avatar
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    What I did was run a gp1200 selector switch. It is .5mm larger ID than a 1100 selector. Stock routing, filter, ect. Actually have too much gas. Running. . . 110pilots and 100 mains. VF3's, stock bore, comp, ect. 1200 cdi.

  7. #7
    Flying Scotsman's Avatar
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    addicted

    stock 44 carbs or Buckshot 44 carbs
    Plus your reeds would account for some rpm over stock.

  8. #8
    cheatin' piston popper addicted's Avatar
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    stock 65u carbs. vf3's i'm sure are helping. I've rejetted alot, and each time gain rpm's. once I am happy with the jetting i will try to do a back to back on the stock vs vf3's. I am curious. . . I can tell you that they are screwing with my jetting, and that the midrange hit is unvelieveable!!!

  9. #9
    CatRunner's Avatar
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    Great info here....>> I`m following along, as I am planning a carb upgrade......

  10. #10
    cheatin' piston popper addicted's Avatar
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    UPdate:

    After playing with popoff and needles, rpm's are up to 6950 on a stock prop 61.5mph before it started bouncing uncontrollably. I have some shimming to do. . .

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