Mikuni 30 MM ebay carb
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  1. #1
    Senior Member Stromper's Avatar
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    My stock Cali tw carb is ridiculous



    At 45 degrees it was still on the enricher after 10 minutes



    So looking around there was a few listings for very old conventional mikuni 30mm carbs

    and they were cheap like 28 to 40 dollars.



    I am trying to rejet the teikei as per the forum

    130 main 34 pilot Note over yesterday stadium web would not work

    so emailed them and will see when they are up.

    Thanks qwerty



    But a whole new slightly bigger carb not jetted for the EPA

    sounded pretty tempting and you can buy any internal part

    jets jet setter etc.

  2. #2
    Senior Member uktw125's Avatar
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    A 30mm Mikuni is too big for a standard TW.



    You must have a problem with your standard carb beyond the normal slightly lean factory setting.

    Go through the carb cleaning and setting posted on the forum thoroughly and you will see a great improvement without any big expense or head scratching finding base settings and final tuning of a different carb, not to mention fitting it up properly.

  3. #3
    Banned qwerty's Avatar
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    Tdub will cold start with no enrichment at 45*F, but will need some finesse with the throttle to bring her to a fast idle. She will ride off with near-normal throttle response after a long enough warm-up to don helmet and gloves. Something is wrong with your carb. I would expect a fuel circuit obstruction, probably pilot circuit.



    There is a lot more wrong with the thinking of amatuer mechanics than there is with any carb Yamaha ever bolted on a TW.




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  5. #4
    Senior Member Stromper's Avatar
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    Well



    When ever I think of C.A.R.B. in California



    I have no confidence in what jets etc. would be in anything

    The parts diagram shows little difference



    Yes when I get the jets to put in she will get

    a thorough going over and yes I suspect that the tiny passages have some kind

    of mung in it. Especially since she was sitting for a while

  6. #5
    Senior Member rm_hm's Avatar
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    A primer on carbs

    http://www.dansmc.com/carbs.htm



    How to clean a Tw teikei carb

    http://tw200forum.co...-carb-cleaning/





    Others with lean running tw's

    http://www.google.co...iw=1011&bih=566





    If you insist on finding an aftermarket carb here are some more links

    http://www.google.co...iw=1011&bih=566







    Now back to my rainy day of reading forums and cleaning house



  7. #6
    Senior Member evan's Avatar
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    I agree its your carb that needs cleaning. Mine didn't want to start easily every time while riding Forresthill OHV (4,000 feet?) with friends sunday. I know the bike has been sitting for long periods of time before I bought it so gonna give it a carb clean out since won't be riding it for a few weekends. I am going to change main jet to one size bigger cuz I've heard/read they run them just a tad lean. Other then the hard starting issue bike climbed hills fine and I loved the 75 degree sunny day!
    Mike Carter. Woodland, California (NorCal). '89 Tw200 (Black Widow Edition). Blood red Jimbo shield, Cycleracks, Nuvi 500 GPS, Kolpin fuel pack jr., D shield bark busters, 55t rear sprocket, Golden boy front tire, Ricochet shield.

  8. #7
    Senior Member Stromper's Avatar
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    I am going to get the jets



    I guess that the airscrew adjustment will have the best change



    I will do the pilot air jet and add a hardware store fuel filter

    My DRZ400S was misserable until I went 1 size bigger



    Tomorrow I will chase after some Yamaha place for the jets



    If yours is a toy not a commuter I wouls recommend

    Always leave her filled

    Add Stabil

    Add Seafoam



    If anticipating 1 month sleep+

    Drain or run her out of gas in the carb

  9. #8
    Banned qwerty's Avatar
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    i have no problem with fuel preservatives in gasoline--treated gasoline will keep for years. Gasohol will not, no matter what treatment is used. I'd drain the tank and spray it with fogging oil, which keeps the tank from rusting. Then run the carb and fuel lines dry.




  10. #9
    Senior Member lizrdbrth's Avatar
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    My standard rant:



    There is NO (none, zip, nada, zero, zilch) difference between a Cali carb and a 49-state carb other than RICHER jetting and the fitting for the canister.



    While we're at it, the canister has NO (none, zip, nada, zero, zilch) effect on performance and causes NO (zero, zip, nada, zilch) service problems. It also has NOTHING (zero, zip, nada, zilch) to do with carb function. It's a tank vent.



    Non-issues, unless you've spent way too much time on ADVrider.



    Rant over til next time someone blames their Cali carb for the Lincoln assassination....



    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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  11. #10
    Senior Member Stromper's Avatar
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    I have ordered the jets from Bikebandit.com over the phone



    Could NOT get anywhere on Stadium Yamaha, site crashed, did not answer etc.



    Thanks for the part numbers they went right through



    Yes, I have fear of anything ECO related, I was shoveling this last Saturday

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