1977 GS400X Advance Assembly Replacement

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  • mcquillr
    • Apr 2026

    #1

    1977 GS400X Advance Assembly Replacement

    Hi All,

    I found when riding that my bike seemed to loose some power over 4K rpm. I started by checking the timing which I couldn?t properly set even when the plate was maxed out in one direction. Then I checked the advance assembly. It looks like the feet that contact the lobe are very worn or like someone had grinded them down at some point for some reason.

    I checked online and found that that part (33120-44011) has been discontinued. Does anyone know where to get a replacement (besides eBay, I didn?t see any direct replacements on there).

    Thanks,
    Ryan
  • tom203
    Forum Guru
    Past Site Supporter
    • Aug 2010
    • 8925
    • Norway,Maine

    #2
    Go ebaying ..but you meant p/n 33120-44021 I think. Also used on gs425


    1981 gs650L

    "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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    • tom203
      Forum Guru
      Past Site Supporter
      • Aug 2010
      • 8925
      • Norway,Maine

      #3
      What's wrong with eBay?

      https://www.ebay.com/itm/Suzuki-GS-G...sAAOSw0URbUp~C
      1981 gs650L

      "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

      Comment

      • LAB3
        Forum Sage
        Past Site Supporter
        • Mar 2018
        • 3564
        • No fixed address

        #4
        Originally posted by tom203
        What's wrong with eBay?
        eBay is a great place to get parts that are no longer availabe, the only bad part is knowing that what you're getting is better than what you already have when it comes to used parts. Luckily I've yet to encounter something I couldn't get new, sometimes that takes some digging.
        2001 Kawasaki Voyager XII (Current bike)
        1982 GS450txz (former bike)

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        • mcquillr

          #5
          Sorry, there is nothing wrong with eBay I get a lot of parts there I just didn't see any on there that fit my bike.

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          • mcquillr

            #6
            Originally posted by tom203
            I emailed the seller for better pictures of the lobe.

            Comment

            • mcquillr

              #7
              I actually found an electronic ignition unit upgrade that replaces both the points and the centrifugal timing advance. Seems like it eliminates more future problematic variables.

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