Another problemo guys (bogging)

Discussion in '2-Stroke Engines' started by Luybaton, Jun 14, 2016.

  1. Luybaton

    Luybaton Member

    Guys I just put a new hul k jug head and piston now it's bogging goes slow really well but won't pick up speed and hesitates really racking my brain! Plz help
     

  2. Frankfort MB's

    Frankfort MB's Well-Known Member

    Is it 4 stroking?
     
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  3. Luybaton

    Luybaton Member

    Sortof I have a Reed valve and a delorto carberater and a banana muffler and the motor has Poo out work done could it be its not getting enough gas?
     
  4. Frankfort MB's

    Frankfort MB's Well-Known Member

    It could be running lean or running rich, I've never had any experience with running lean

    Look up carb tuning
     
  5. crassius

    crassius Well-Known Member

    Did you check that the port mapping was same on new/old cylinder?
     
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  6. Luybaton

    Luybaton Member

    No. So I need a new piston?
     
  7. Frankfort MB's

    Frankfort MB's Well-Known Member

    No he asked if you checked to see if the top end you put on was right
     
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  8. Luybaton

    Luybaton Member

    Have no idea
     
  9. jaguar

    jaguar Well-Known Member

    could be now you have too high compression ratio
    or you have a head gasket leak.
     
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  10. Frankfort MB's

    Frankfort MB's Well-Known Member

    I doubt a head gasket because he said it has good low end power, it could be detonating

    What spark plug and octane fuel do you use?

    If you have increased compression it could be that you need Jaguars cdi
     
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  11. jaguar

    jaguar Well-Known Member

    that's right. High compression needs the spark to happen later, which my CDI allows.
    Alternatively you can add another head gasket to lessen the compression.
     
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  12. Luybaton

    Luybaton Member

    OK guys it started to pick up speed but still weak feeling like it has way more to offer it's not a new motor so breaking it in would make no sense what would lessoning. Also I think my spark plug is backwards. U think if I put my old compression head we're my piston blew it would maybe be better?
     
  13. Luybaton

    Luybaton Member

    Used to use 93 boost octane with Walmart 2cycle lately it's been 89
     
  14. Luybaton

    Luybaton Member

    How would I get a cdi from u?
     
  15. Frankfort MB's

    Frankfort MB's Well-Known Member

    http://www.dragonfly75.com/motorbike/CDI.html
    Here's how it works and jag sells his CDI to a couple of different people
    http://www.jnmotorsbikes.com/mobile...nmotorsbikes.com:80/Jaguar_CDI_p/jnm1195.htm=
    I think this is where you can buy the real jag CDI.... I've heard nothing but good things about it but I can't afford them and I haven't had much problems with the stock CDI


    You probably should be using full synthetic oil with a cold plug like a B7HS or B8HS and the highest octane fuel you can get

    Do all of that and it should run better even if what's going wrong isn't what we think it is
     
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  16. Luybaton

    Luybaton Member

    Now my carberater is smoking white smoke stalled on me turned off had to force my chain to move to get my piston to move
     
  17. Luybaton

    Luybaton Member

    White smoke was coming out of my carberator and it stalled out I had to force it to start
     
  18. gary55

    gary55 Active Member

    Smoke out of the carb could be combustion gases getting by the rings. I would pull the head and look for scoring on the cylinder walls
     
  19. Luybaton

    Luybaton Member

    There is bad scratches and piston ring melted on the front..
     
  20. Frankfort MB's

    Frankfort MB's Well-Known Member

    There's your problem, a top end kit isn't that expensive and also isn't that hard to put on
     
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