Yamaha 50 Dirt Bike

Discussion in 'Yamaha' started by Quadrider10, Aug 12, 2014.

  1. Quadrider10

    Quadrider10 Member

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    alright im completely out of ideas with this thing. ive tried everything! no leaks, clean carb, and tried adjusting the fuel screw. brought it to the yamaha dealer and they have no idea what up with it either. also they had no jets for it.... im stumped. if i richen the fuel screw, it bogs like hell and is hard to start. if i lean it, it runs fine, but runs terrible and has no power. if i turn on the choke, it runs near perfect (still a little lean). with the air box open. it runs terrible and bogs too much. idk what to do. should i up a jet size or two? pilot, main? idk where to even find them. help! lol
     
    Last edited: Aug 14, 2014
  2. Quadrider10

    Quadrider10 Member

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    anybody know???? im completely out of ideas o_O
     
  3. harley1-5

    harley1-5 Active Member

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    if choke on makes it run better that indicates a dirty carb or an airleak
     
  4. Quadrider10

    Quadrider10 Member

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    ok, i really need to figure out this bike so i can get paid and send it back, but im completely stumped. help please?!?
     
  5. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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    i had same problem with ttr90..took awhile but i believe what fixed it was turning air screw down and idle up,fresh gas..that was my experience:)Have you tried adjusting it while it is running? if not do it:)
    Make sure your screwdriver is actually turning it and not hitting carb body,if i remember correctly i had to real work at getting to airscrew cuz it was installed backwards to almost every carb on the planet......
    got any pics lol..have you searched the web for the same problems?i bet it is happing to all of those bikes....
     
    Last edited: Aug 18, 2014
  6. Quadrider10

    Quadrider10 Member

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    I have. I spent a day trying to adjust air screw. It just Boggs more with it out.
     
  7. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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  8. Blaaster

    Blaaster Moderator Staff Member Technician Forum Supporter

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    Is the slide needle adjustable or is it fixed?
     
  9. benharcombe1985

    benharcombe1985 New Member

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    from your first post id be inclined to check the fuel tap delivery our nippers malaguti did a similar thing and the petcock seal was blocking the flow only allowing it to idle but not rev out under load as if it was out of fuel
     
  10. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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  11. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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    thats one effed up carb
    the blaster even had a recall on the o rings too the pet fuel @#$% as per say local yamaha dealer in my town
    try loosing the gas cap to ,to see if it changes
     
  12. benharcombe1985

    benharcombe1985 New Member

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    bloody hell by the complexity of it id say someone has had a tinker before it got to you mate , air leaks could be plentiful on a carb like that with all its brilliance lol
     
  13. benharcombe1985

    benharcombe1985 New Member

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    all in thinking mate equates to giving it a leak test to save time and money otherwise its a a long process of elimination which is never anygood
     
  14. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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    when something sits for a long time,then obviously carb gets dirty,seals go bad and animals build nest in exhaust,thing get gummed up,in researeching my ttr90 problem like 1 year ago people were just simply replacing carbs,i clean adjusted,rode for like 4 days till problem solved lol ect..then again i fix everything that comes my way for pennies if not free :)
     
  15. Quadrider10

    Quadrider10 Member

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    ill try leak test if i can. but im certain its ok. btw this is a 2006 ttr50. so that is not the carb.
     
  16. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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  17. Quadrider10

    Quadrider10 Member

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    fixed it. i spent about 30 mins cleaning the pilot jet, and it seems to run good enough.
     
  18. speedyslyder

    speedyslyder 2 STROKES RULE Technician

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    cool:D
    tell customer to start it once in awhile,unless he wants to keep cleaning carb,and or buy new jets lol :)
     
  19. Quadrider10

    Quadrider10 Member

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    hes selling it lol
     

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