crosswind performance
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  1. #1
    Junior Member cronzie@yahoo.com's Avatar
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    When I am riding in a stiff crosswind, right quartering usually, the bike gags, chokes and today it quit twice. But when I turn downwind or a rear quartering crosswind, the bike runs like new. What is going on here?

  2. #2
    Senior Member lizrdbrth's Avatar
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    Ive not had it happen on a TW, but some bikes will either cavitate or even "supercharge" at the snorkel entrance to the airbox if a crosswind is srong enough. Those can lead to a temporary lean or rich condition.



    Since yours is occurring when the wind is quartering on the snorkel side this could be one cause.



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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  3. #3
    Senior Member scotti158's Avatar
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    Do you have the stock airbox and filter on it?
    2013 Yamaha TW200

    1996 Yamaha TW200

    1995 Kawasaki KLR650

    2002 Yamaha RoadStar 1600 with sidecar

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  5. #4
    Senior Member lizrdbrth's Avatar
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    Quote Originally Posted by scotti158 View Post
    Do you have the stock airbox and filter on it?


    +1.



    The same sorta thing but different can occur through the carb vents, as well. Either would be in the "goofy" category with the stock setup, but possible.



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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  6. #5
    Junior Member cronzie@yahoo.com's Avatar
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    Quote Originally Posted by lizrdbrth View Post
    Ive not had it happen on a TW, but some bikes will either cavitate or even "supercharge" at the snorkel entrance to the airbox if a crosswind is srong enough. Those can lead to a temporary lean or rich condition.



    Since yours is occurring when the wind is quartering on the snorkel side this could be one cause.
    Thanks for your response. I read an article a few years ago in MC Consumer about the wind creating a low pressure area and pulling the air back from the carb. If it is cavitating, is there some way to deflect this or something?

  7. #6
    Junior Member cronzie@yahoo.com's Avatar
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    Quote Originally Posted by scotti158 View Post
    Do you have the stock airbox and filter on it?
    Yes, everything is stock.

  8. #7
    Junior Member cronzie@yahoo.com's Avatar
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    Quote Originally Posted by lizrdbrth View Post
    +1.



    The same sorta thing but different can occur through the carb vents, as well. Either would be in the "goofy" category with the stock setup, but possible.
    Is there a way that I can shield this or something? The 200 is my horse. When I am trying to control a bunch of cattle, they can outrun me when the bike starts acting up. In no wind conditions, it runs like new.

  9. #8
    Senior Member r80rt's Avatar
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    Have you looked in the air box?
    Only a fool would attempt it, and God help me, I am that fool!

  10. #9
    Senior Member srs713's Avatar
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    I had this happen often in Kansas. The wind blowing from the right at just the right angle would cause the motor to stumble.



    Haven't had it happen since moving to Georgia. No long straight roads where the wind can hit me for any length of time.

    Stephen S.

    '07 TW200:

    15/50 sprockets, O-ring chain, D2Moto foot pegs

    tweaked carb (127.5 jet, 0.019 needle shim, idle screw @2.25),

    Rubbermaid "Action Packer" on homemade brackets

  11. #10
    Junior Member cronzie@yahoo.com's Avatar
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    Quote Originally Posted by srs713 View Post
    I had this happen often in Kansas. The wind blowing from the right at just the right angle would cause the motor to stumble.



    Haven't had it happen since moving to Georgia. No long straight roads where the wind can hit me for any length of time.

    yeah, it happened again this morning when I was coming back into town from the ranch. Again, a right quartering wind, once I turned onto the county road and angled away from the wind of about 20 or 25 mph, it ran fine. I am going to try and figure out some way to shield the carburetor and see if that works.

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