Jetting help please!

Discussion in 'Full Rebuilds' started by Inked soul, Apr 6, 2021.

  1. Inked soul

    Inked soul Member

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    Finally got my motor done 240 vitos with the plus 3 stroker , I got k and n air filter, vforce4 reeds, b1 toomey pipe n silencer, mixed gas at 32:1 heavy for the first gallon, tors is deleted, and I’m running a stock carb with blue needle on second clip up from bottom with a 360 main and 35 pilot, my idle screws all the way in and it’s just holding an idle, runs through the gears great but plugs coming out blackness dry, change the main it don’t effect the idle screw, needle either, any help would be appreciated!! What’s anyone running for jets that has close to what I have for mods? Am I in the ball park? Scared to blow it!!!
     
  2. Larry's Shee

    Larry's Shee Active Member

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    First off did you do a leak down test? Heat cycles and retoque head and jug?
     
  3. Larry's Shee

    Larry's Shee Active Member

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  4. Inked soul

    Inked soul Member

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    No I did neither, I’ve never done a leak down test, but I can’t believe I don’t check the head thanks for the reminder! I’ll check this link out u sent
     
  5. Awk08

    Awk08 Administrator Staff Member Technician

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    I can't recall anyone having any luck running a stock carb with a built 240 engine
    I highly suggest you look into a 35/36mm carb and intake, then you'll find all the jetting info you need.

    heavy for the first gallon < you also just leaned out the air/fuel ratio, more oil = less fuel
    less fuel = boom
     
  6. Inked soul

    Inked soul Member

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    I thought I seen in the carb section ppl saying they had better luck with the stock carbs, what kind of carb do u recommend? I’m not rich but I’d spend a couple hundred or so on one if that’s my issue I want it to run at it’s potential
     
  7. Inked soul

    Inked soul Member

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  8. Inked soul

    Inked soul Member

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    I drained the gas mixed it right 32:1 put my 390 main 35 pilot in, idle screw is all the way in idling a little low, rode it, plug was wet n black, retorqued all head n cylinder nuts, havnt done a leak down test , let me know what u think awk on what’s a good but affordable carb for this set up n I’ll go from there, I appreciate ur help!
     
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  9. Inked soul

    Inked soul Member

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    I’m looking at a 35 mm pwk air striker carbs there’s a wide range from $40-400$ Who sells the good ones?
     
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  10. Slydog

    Slydog Active Member Technician

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    People are running those.
    Of course the $40 ones are Chinese knock offs. Stay clear.
    Jetsrus or sudco and some others
    Have the real deal kehin
     
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  11. Slydog

    Slydog Active Member Technician

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    Where's your air screw mixture set at?
    The blue needle runs rich on most pipes
    Other than the fat basterd.
     
  12. Inked soul

    Inked soul Member

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    Awsome thanks for the reply, my air screw is still at stock settings I’m not firmiliar with how to adjust the air, idle is all the way in n I’m using the blue needle on the second clip up from bottom, is the 35 mm air striker a good choice? Thanks again for the help
     
  13. Slydog

    Slydog Active Member Technician

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  14. Slydog

    Slydog Active Member Technician

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  15. Inked soul

    Inked soul Member

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    man thanks allot slydog, you’ve helped tremendously ima give it a go after work today!
     
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  16. Awk08

    Awk08 Administrator Staff Member Technician

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  17. Inked soul

    Inked soul Member

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  18. Inked soul

    Inked soul Member

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    Br9es*
     
  19. Inked soul

    Inked soul Member

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    I got my carb today pwk airstriker it came with a 45 pilot and 160 main in it, do u think that’s a good starting point? Should I start higher? I had a 390 main in my stock carb seems like a big difference...should I be running br8es for a plug? I been running a 9 since I put on the bbk thanks for the help ima wait n get some opinions befor I try it
     
  20. Inked soul

    Inked soul Member

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    Anybody running a 35 mm pwk?
     

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