Clutch Actuator Zerk Fitting CB175K6
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  1. #1
    Senior Member Russ Lang's Avatar
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    Clutch Actuator Zerk Fitting CB175K6

    Hi guys I am in the process of replacing what Honda calls the Thread, Clutch and Adjuster, Clutch (p/n 22810216030 and 22841216030) on my CB175K6. Together these parts rotate on threads and push on the clutch rod when you pull on the clutch lever.

    The threads on mine developed some spalling which caused the clutch to stick in the disengaged position. It happened once last year, a couple times early this season and four times on my last ride. Unnerving in traffic to say the least!

    Anyway I'm pretty sure poor lubrication is mostly to blame. I was never able to find a grease gun tip that worked with the zerk fitting on the left side crankcase cover. It looks like its pressed in so it might be possible to swap out but I dont want to damage the case cover. Any ideas? Thanks!

    Clutch Actuator Zerk Fitting CB175K6-screenhunter_02-aug.-13-10.11.jpg
    Clutch Actuator Zerk Fitting CB175K6-screenhunter_01-aug.-13-10.11.jpg
    Clutch Actuator Zerk Fitting CB175K6-20190811_140050-1-.jpg
    Clutch Actuator Zerk Fitting CB175K6-20190811_152659-1-.jpg

  2. #2
    Senior Member ancientdad's Avatar
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    Many change to a zerk fitting on swingarm bolts and other locations, but my solution to this (learned as a kid from my father) is to use this mini-grease gun - it's cheap and very effective, and it delivers a small amount of grease per pump so you don't overload small areas like that easily. The tiny tip fits into the opening where the check ball is, depresses the ball and open the hole in the fitting. They're currently out of stock there and you can find the same gun elsewhere, but everyone else wants a fortune for one

    https://hobbyking.com/en_us/mini-grease-gun.html
    Tom

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  3. #3
    Senior Member mike in idaho's Avatar
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    +1, that's the same style grease gun I use, you can get at most small engine & chain saw shops. Fits any grease zerk, just the thing to a dab of grease where you need it or to run a thin line of grease around the edge of a side cover gasket. Drill a hole in the top and install a grease fitting so you can refill from a larger gun, no mess and no grease cartridges.
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  5. #4
    Senior Member Russ Lang's Avatar
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    Thanks guys I'll look into that little gun. Actually I suspect properly lubing the parts before I install them will be sufficient for a long long time. I just dont put that many miles on the bike and it never gets wet.

    Here's a side thought: The parts I took off have some galling and there is just one spot (where the clutch had been disengaged) that sticks under pressure. Do you think I could put some valving lapping compound on the threads and re-polish everything back to smooth? What grit would I use?

  6. #5
    Senior Member ancientdad's Avatar
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    Post some pictures of it... I can't envision what you're seeing, but it's possible just being properly lubed would help alleviate the issue. I haven't ever had to "repair" one, but they are a lot older now too
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  7. #6
    Senior Member Russ Lang's Avatar
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    Hi Tom,

    Here are some pics. In the first one you can see a flat spot on the thread, I suspect this is what is hanging up. It only happens under pressure and I can feel it if I press down as if my hand was the clutch rod pushing back while rotating the arm. The rest of the marks are probably from tooling and don't seem to prevent smooth rotation. It's difficult to get a shot inside the adjuster piece but i assume there is a matching flat spot in there someplace.

    Clutch Actuator Zerk Fitting CB175K6-20190813_131434-1-.jpg
    Clutch Actuator Zerk Fitting CB175K6-20190813_131535-1-.jpg
    Clutch Actuator Zerk Fitting CB175K6-20190813_131552-1-.jpg

  8. #7
    Senior Member ancientdad's Avatar
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    I don't know if it would help, but you could try using a flat file to smooth off the spot and blend it in with the sections before and after it, then lube it up really well with grease that has graphite content in it and see how it responds. Or as you suggested, lapping compound might do the trick too... start with finer stuff first to be safe
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  9. #8
    Senior Member Russ Lang's Avatar
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    I'm pretty good with a file and I might try touching up the flat spot and then lapping to address the damaged internal threads. But I've also ordered replacement parts from CMSNL and a new grey clutch cable from 4into1. The clutch pull always seemed a bit excessive to me for a 175 and I'd like to make it as silky smooth as possible. I'm going to be out of the country for a few weeks so this will all have to wait until September. Thanks again for the help!

  10. #9
    Senior Member budlite282's Avatar
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    Where's the little ball bearing?

    Number 12 in the attachment.
    Attached Thumbnails Attached Thumbnails Clutch Actuator Zerk Fitting CB175K6-e13315010.jpg  
    Last edited by budlite282; Yesterday at 12:29 PM.
    "If it ain't raining, I'm riding......"

    Work in process:::::

  11. #10
    Senior Member Russ Lang's Avatar
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    Safely in a jar at home Budlite! But when I was wiggling the side cover off guess what went PLOP into the oil drain pan?

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