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The Yamaha TW200 Thread...

Discussion in 'Thumpers' started by neepuk, Jan 10, 2009.

  1. Padilen

    Padilen Long timer

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    Jun 21, 2014
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    3,491
    I created an issue on my DRZ. I used a California tank. Plugged the air vent. I mistakenly assumed that if gas leaked out air could get in. Once I un- plugged vent gas flowed. Is gas flowing to carb all the time.
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  2. Mi0

    Mi0 Distilled potato connoisseur

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    I do have a question on using the clutch since my finger naturally curls back on the bar thus not covering the lever like @afordableperformance mentioned. When I shift down I usually do not disengage the clutch. Is that a bad habit? I only do this when I am moving fast on trails (by fast I mean TW speed).
  3. frog13

    frog13 Long timer

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    JagLite. If you don't mind, and if your brother is so inclined, have him switch the main jet only from your bike ( carb) and put in your brothers bike ( carb).....just to see the affect. If it starts.....it's definitely his carbs main jet......if this hasn't already been done.
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  4. frog13

    frog13 Long timer

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    Always disengage clutch during shifts.....unless it's a gigga-second emergency.
  5. afordableperformance

    afordableperformance Been here awhile

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    I have experienced issues similar to this and it has been moisture in the fuel (E10) and/or tank. Look very close at the main jet you will most likely see a small water bubble on the jet keeping fuel from passing through the main jet. It takes a lot of flushing and 100% gas if you have it in your area. Otherwise you may have to run some sort of additives or filter your gas. That has been my experience and it was mainly due to E10 been running 100% with no issues for many years now.
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  6. nihil

    nihil Adventurer

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    Some bikes can tolerate clutchless shifting, to a point. As a general rule, always have a finger on the clutch. Not just for shifting, but modulating it along with throttle for more finite control under the sometimes odd circumstances a farmbike in the woods can get you into.

    Maybe pick up a set of adjustable shorty levers if you haven't already.
    Mi0 likes this.
  7. Mi0

    Mi0 Distilled potato connoisseur

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    Already got shorties.
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  8. Padilen

    Padilen Long timer

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    I'm a bad person, I shift without clutching often. It's actually a good skill to learn. If you ever break a lever, your not stranded.
    JagLite, WYO George and Mi0 like this.
  9. FEG32

    FEG32 Too old and fat for any of this.....

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    Aug 23, 2010
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    Added a little peace of mind in the form of additional fuel capacity. 614FFA5C-DA30-4ECE-A0E2-FB3F04E9D561.jpeg A0AC612D-7D71-4FCB-9FC6-DE4B4287F8D0.jpeg
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  10. FEG32

    FEG32 Too old and fat for any of this.....

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    You’re gonna love it, congrats!
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  11. NJ-Brett

    NJ-Brett Brett

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    I would remove the gas tank and do a POR-15 on it.
    That will take care of any rust or grunge in it that will plug up small jet passages.
    You can then remove the fuel filter, they can cause problems.

    My bike, with the pro cycle jet kit needs choke to start and a little bit of throttle.
    Once it starts, it will idle high and I can put the choke to the center position and ride off.
    In summer I can turn the choke off and ride off, but not in winter.
    The bike will not start on the choke without some throttle.

    As an easy test, before trying to start it next time, have him turn the gas on, then open the carb bowl drain screw for a second and let some gas/water out,
    close, then try and start with the choke on.

    I agree, the main jet has nothing to do with starting, it can be plugged up and the bike should still start normal.
    Sounds more like water in the gas as it WILL be at the bottom of the float bowl.
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  12. NJ-Brett

    NJ-Brett Brett

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  13. FEG32

    FEG32 Too old and fat for any of this.....

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    Cincinnati, OH
    Yeah, very well could be, I’m gonna give it a go and if it feels weird I’ll mount it to the top.
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  14. WYO George

    WYO George I have no idea

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    I would take a good look at the float level. If the float valve is letting fuel slowly seep in too high then it will self correct when he drains the bowl to remove it and blow through the main jet. A simple test with a clear tube will show you where your fuel level actually is. It's also how you double check your float settings after a carb rebuild.

    [​IMG]
    Most bike carbs will have the fuel level at or just slightly below the parting line where the bowl meets the body. I'll see if I can dig up the exact measurement for a TW, or if not I'll go grab the measurement off one of the ones in my shop that has a brand new carb on it. I work on so many different bikes that I no longer trust my memory when it comes to all the details of a particular model.
    Mi0, frog13, Ride Now and 3 others like this.
  15. frog13

    frog13 Long timer

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    WYO George.......nice!.
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  16. Fr8dog61

    Fr8dog61 Been here awhile

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    From factory manual... D425D0FD-0802-4B92-9014-1D96E0D37295.png

    “Fuel level gauge” is just a piece of clear tubing.
  17. Lil' Steve

    Lil' Steve PussyWagon™ Chauffeur Supporter

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    I see you already received some good suggestions. But the problem is you're a few miles away from the bike. OK, a little more than a few. Let us know when you'll be down again next month and we'll try to get it sorted out. Then we can go to that great Mexican restaurant again! :dukegirl
    frog13 and JagLite like this.
  18. JagLite

    JagLite Long timer Supporter

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    I like that idea! :beer :ricky
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  19. frog13

    frog13 Long timer

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    Love it when a plan comes together!.
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  20. frog13

    frog13 Long timer

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    Nice !...... a good team member you are.
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