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Thread: Changing Keihin cab to mikuni on 85 250r

  1. #1
    Join Date
    Nov 2008
    Location
    arkansas
    --
    5

    Changing Keihin cab to mikuni on 85 250r

    Long story short couldnít get the keihin to stop overflowing ,so I bought a striker 38 carb off of eBay and never got it in . Seller still claims it was on back order, so I called sudco and they told me I couldnít get stock keihin carb and that all I could get get was a mikuni 34 mm. Question is Iím not familiar with Mikuni will I have to change throttle cable ,their both round slide and what jet sizes do I need to start out with . bike is stock Iíve tried to order two keihin carbs with no luck just trying to get back riding.

  2. #2
    Join Date
    Nov 2019
    Location
    Florida
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    955
    I'm sorry, I cant answer your question, but I can recommend www.223cycles.net for all your future carb needs.
    MrC.
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  3. #3
    Join Date
    Jul 2009
    Location
    South Florida
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    6,639
    I would not run a mikuni , a lot harder to jet .
    A keihin 34-38mm with a 170 main and your good to go , sometimes you have to play with the needle but way easier than trying to dial in a mikuni .
    Here is a 35mm in stock at a decent price .

    https://www.ebay.com/itm/28439753126...Bk9SR7bX1pOUYQ
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  4. #4
    Join Date
    Jan 2012
    Location
    Carthage NY 250r rules
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    2,322
    I'm using a Mikuni TMX 38 from a 01 cr 250r. I rejetted it and put a S-7 emulsion tube in it works great on my 83 250r.
    250r rules

  5. #5
    Join Date
    Mar 2010
    Location
    Arizona
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    841
    I have had Keihin and Mikuni carbs on my R. Generally, I'd say the Keihins are easier to tune--more of a set and forget carb. The Mikunis can be temperamental. You could get a new 34 mm Keihin oval slide from Sudco, the kind that came stock on the 86 250R. If you are looking to go bigger, a 38mm, I'd recommend the Keihin PWK first and then the Mikuni TMX. I currently have a 38 TMX on my 86. I'd stay away from the Mikuni TM. There is only one machine I've gotten it to work halfway decent on.

  6. #6
    Join Date
    Nov 2008
    Location
    arkansas
    --
    5
    Thanks I’ll try and send this mikuni back to sudco and get a Keihin . I thought I’d ask here about opinions before I put it on. Didn’t know anything about Mikuni carbs

  7. #7
    Join Date
    Nov 2008
    Location
    arkansas
    --
    5
    I’ll have to try eBay again Sudco doesn’t have any Keihin carbs at all for the r

  8. #8
    Join Date
    Oct 2003
    Location
    Las Vegas, NV.
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    2,374
    Quote Originally Posted by mallardoak View Post
    I’ll have to try eBay again Sudco doesn’t have any Keihin carbs at all for the r
    A lot of eBay sellers will sell you a carb, then have it shipped to you directly from Sudco. So if Sudco is out of stock, then so is the seller. Try contacting the seller before purchasing to make sure they actually have it in stock.
    Red Rider's Sand Machine Updated 07/23/14

  9. #9
    Join Date
    Mar 2010
    Location
    Arizona
    --
    841
    Beware cheap Keihins on ebay--they are Chinese knock-offs.

  10. #10
    Join Date
    Nov 2008
    Location
    arkansas
    --
    5
    Got my 35 mm pwk Stryker in. What throttle cable do I need , mine is the one with the top built on it. Do I need to start with 170 main like short line suggested. Thanks

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