Swingarm bushings, collars, wear tolerances, replacement
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  1. #1
    Senior Member Tremelune's Avatar
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    Swingarm bushings, collars, wear tolerances, replacement

    I'm building a '68 CL350 and I've just gotten to taking apart the swingarm a bit. My plan was to install some new bronze bushings, and I wound up buying these bronze bushings from performanceintl (in Costa Mesa CA) off eBay. Hopefully they're "good", as I couldn't get ahold of Bob Franzke the "Polish guy", and both mentioned their bushings were SAE 660 bearing bronze (Alloy No. C93200). Although, the guy at Performance Intl was named Bob, so maybe they're the same guy...

    As part of my research for replacement bushings, I read that it was likely that the collars would be worn as well. After cleaning them up, I noticed the grooves seemed uneven, and one of them had some surface rust (!). One is 20.0mm in diameter, and the other seems to be closer to 19.9mm. Is there any "spec" for these things, should I just write them off due to the rust, or is it no big deal?

    I'm gonna put them in a parts tumbler overnight, but I don't have high hopes here. I'm just told they're no longer available from Honda.


  2. #2
    Senior Member Tremelune's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    According to whatever this is, I can have Phil Denton Engineering make some for me if need be...Anyone ever heard of this??

    Ah, the joys of sourcing pieces of metal in exactly the right shapes...

  3. #3
    Super Moderator longdistancerider's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    I don't remember the year of yours, my 72 CL uses 52141-286-000 and 52141-268-000 collars. The long one, 52141-286-000, I found on ebay http://www.ebay.com/itm/Honda-CB350-CL3 ... _793wt_663 and the short one 52141-268-000 I got from Honda last week. The guy on ebay shipped pretty fast, got within 2 weeks instead of the expected 5-6 weeks.
    The guy Bob you talked to at PI is Bob Franzke.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration


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  5. #4
    Senior Member Tremelune's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    Excellent, though these bits are pricey. Was that part from eBay of good, unused quality? I'm wary of unmarked parts on paper sheets coming from Thailand...

  6. #5
    Super Moderator longdistancerider's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    It looks the same, other than no wear on it. The old one is in the bike for assembly purposes at the moment but I'll be pulling it in the next day or so and measure it to be positive.
    Yeah, a bit pricey but what can we do when we need the part. One thought I've had was to have it turned down and get an industrial coating/chroming done to bring it back to spec..
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
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  7. #6
    Senior Member Tremelune's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    They didn't look great even after tumbling for hours, so I figure why mess around with a wear item? Gonna pick up one of each...

  8. #7
    Super Moderator longdistancerider's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    Swapped out the old and new collar today, the one from Thailand. ID and OD are exactly the same, the length is .010" longer which is good since the old one seemed too short and was causing too much on the swing arm when torqued. Now it's moving freely.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
    Road Trip https://www.hondatwins.net/forums/11...here-i-go.html or "where's Jim now?"
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  9. #8
    Senior Member Tremelune's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    Great! How did you get the old ones out? I'm about to take a hacksaw to them...

  10. #9
    Super Moderator longdistancerider's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    Hammer and punch from the opposite side, like doing a wheel bearing. There's a gap in the middle
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
    Road Trip https://www.hondatwins.net/forums/11...here-i-go.html or "where's Jim now?"
    Member Map https://www.hondatwins.net/forums/dcMembermap.php

  11. #10
    Senior Member Tremelune's Avatar
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    Re: Swingarm bushings, collars, wear tolerances, replacement

    I got them out, but they were a bear. My blind-hole bearing puller came in mighty handy, and I finally bought a proper propane torch as this is the second time it would have been lovely to have. None of them would budge until I put two deep grooves in each with a hacksaw.



    Here they are next to the glorious brass bushings:



    The bushings are 20.8mm long (with the lip being 3.9mm). Large outer diameter is 30.8, and the small outer diameter is 26mm. The inner diameter is 20mm. My micrometer seems to be +/- 0.1mm...

    Now what do I do about the shock mount bushings? Mine look janky.

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