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  1. #1
    vettespeed
    Guest

    Ultra 150 w/ A/M flame arrestors/no choke plates. Too Lean?

    Just bought my second 99 Ultra 150. It has 67 hours on it, is in good shape, runs good, and has good compression across the board. Here's the question. It has had the choke plates removed and a primer added along with aftermarket flame arrestors, I think R & D. Is this asking for trouble? I have come across info in the past that removing the choke plates is a bad idea and worse yet adding freer breathing flame arrestors without at least shimming the slides and going richer on the jets. Do you think I have a mid-range lean condition, overall lean condition? How do you know if you have a mid-range lean condition? Do you literally do some plug chops after some part-throttle passes rather than the typical full throttle plug chops for checking mixture at full throttle? Can anyone direct me to pictures/info on how to properly read the plugs or any other method to know if I have a potentially dangerous condition. The air is already very dense here in WA state. My 1st bone stocker with just a Shredmaster runs 67.8, not even a shimmed pump. Thanks guys, Mike.

  2. #2
    I dream skis Winterstick's Avatar
    Join Date
    Nov 2002
    Location
    Telluride Colorado
    Posts
    683
    When at first you don't succeed
    STOP
    No sense in making a fool of your self about it

  3. #3
    vettespeed
    Guest
    Yah,
    I tried posting there but surprisingly enough I'm not getting any info. Thanks though, Mike.

  4. #4
    vettespeed
    Guest
    Yah,
    I tried posting there but surprisingly enough I'm not getting any info. Thanks though, Mike.

  5. #5
    Frequent Poster
    Join Date
    Mar 2005
    Location
    Massachusetts
    Posts
    164

    Maybe...

    Some people can remove the chokes and have no problems, others remove, go lean, and fry a piston. The same thing goes for aftermarket F/As - some people run them for years, others have problems.
    At the very least, I would run the entire stock F/A if the chokes are removed. There is no significant gain in running aftermarket F/As, and running the stock airbox will give you a safety margin.
    If you want to learn more, check out http://www.groupk.com/k1200-1pipe.htm

    Eric

  6. #6
    Frequent Poster pork chop's Avatar
    Join Date
    May 2003
    Location
    Texas
    Posts
    167
    I have an extra set of modified carbs with flame arresters ready to bolt on if you want to buy them. 40 hours --no salt---came off a perfectly running ski---complete----$250---sreser@comcast.net
    I forgot to add that the arresters are a little warped because the person riding got t-boned, the seat ejected and his broken leg went in the engine compartment and he was sitting on the arresters.
    Steve \"Pork Chop\" Reser #262

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