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  1. #1

    Join Date
    Aug 2018
    Posts
    18

    Default Mikuni 42 HSR with K&N Air Filter

    Guys, how do I properly secure a K&N air filter with cover to a Mikuni 42 HSR carb? The bike is a 2001 Sportster. The air filter only has the large hose clamp and there are no brackets. I can't see how the carb slip on connection at the intake manifold can support all that weight. The air filter with cover is ML-092B.
    Attached Thumbnails Attached Thumbnails 7A750460-6807-411C-B626-EDF691B73362.jpg   B3BEFDFA-FB50-4669-9023-8FC5ECA401C6.jpg  

  2. #2

    Join Date
    May 2015
    Posts
    768

    Default

    Not in the instructions? Try contacting Mikuni tech.

    I had the same type carb decades ago and damn if I can remember how I supported it. I seem to remember I had a bracket from the air cleaner backing plate to somewhere on or around a lifter block, or close to it

    In your case it looks like your air cleaner base is actually rubber and part of the air cleaner element itself, so that wont work

  3. #3

    Join Date
    May 2015
    Posts
    768

    Default

    I seem to also remember I had a time trying to mount the choke knob as well w/o coming close to hot engine parts, pinching the cable or making it hard to reach the knob in the first place. I beleive I had to make a bracket and mounted the bracket somewhere on or close to the engine

  4. #4
    Senior Member

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    Join Date
    Dec 2018
    Posts
    2,440

    Default

    Most installations of Mikunis on H-Ds utilize an adapter that allows the stock air cleaner assembly to be used. That helps, because the stock air cleaner also supports and retains the carb, on the evos & twinkies. The bad news is that inlet adapter is awful for flow. I like your air cleaner choice better, but you are on your own for a carb support. And you have to come up with a breather system for the heads as well.

    Jim

  5. #5

    Join Date
    Aug 2018
    Posts
    18

    Default

    Thanks for the info guys. I was able to find some parts online. I found the adapter that JB mentioned.. adapter for Mikuni to CV type air filter.. Also found a bracket (LowBrow) and breather bolts (TC Bros). I'll try putting it on this weekend and take pictures.

  6. #6

    Join Date
    Aug 2018
    Posts
    18

    Default

    Here's what I ended up installing..
    https://imgur.com/a/7diCtCt
    https://imgur.com/a/5OduM2M
    Attached Thumbnails Attached Thumbnails IMG_0364.jpg   IMG_0365.jpg  

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