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    Stainless Bolt Replacement.

    OK, to start with, I ordered the SS screw set from Z1 and ended up having I think 5 bolts left over that weren't required.
    This replaced most of the bolts on the engine with shiny new SS hex head fasteners.
    So I then went on to locate all the ones that hadn't been replaced, including the cam chain tensioner bolts, one of which broke. and the handlebar bolds and the caliper slide bolts. and the electrical panel screws and the airbox screws. all the carb screws. basically, my goal is to not have a single Phillips head screw or plain bolt on the bike when finished.
    Pete was helpful enough to remind me (call me out on) that SS isn't really any grade of hardness and that I maybe shouldn't replace anything heavy duty with SS. example stated was the cam chain tensioner. More on my mind though is the caliper. I usually brake with the rear more than the front and don't do much of that really, however I find the thought of shearing off the bolts and losing the front brake or handlebar for that matter(or engine) rather terrifying.

    So I started researching. alot of the bolts are stamped with '7' on their heads. this makes me think that 12.9 grade bolts should be more than sufficient for replacing the load bearing bolts. I recently stumbled upon what seems to be a relatively cheap source of 12.9 grade chrome hex head fasteners which seem like they would be perfect for the caliper bracket and the engine mount bolts. but what about the bolts that hold the handlebars on? or the controls?
    or the sissy bar? the shifter?

    the question is, which bolts do you think really need the harder bolts and which is SS sufficient for? Should I be looking for 8.8 or 10.9 instead? nothing for sale anywhere seems to be stamped with a 7, especially when you are doing the hex heads

    PS my favorite ones so far were the screws for the master cylinder reservoir. Want to know why? because I would have been riding my bike this whole time if I hadn't messed with the screws in it and had that spark the entire rebuild of the bike during riding season.

    #2
    Hmmm guess I'd best reply seeing my name is already in the first post

    To be honest I get a bit lost with this whole grade of steel thing, so I just make sure I use the correct Suzuki bolt whenever it comes to something structural.

    My understanding was that SS bolts are too brittle for those purposes, but as I say it's only an understanding, not something I'm aware of for technical reasons...

    Anyway, I recall seeing in the factory manual a table outlining all the torque spec's and a list below that of the various types of bolts in use. I won't get down there tonight, but I will try to remember to look in the morning and find it.

    I'm not sure how much it will help (if at all) but I'll post the info...
    1982 GS450E - The Wee Beastie
    1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

    sigpic

    450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

    Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

    Comment


      #3
      Originally posted by apopleptic View Post
      I usually brake with the rear more than the front and don't do much of that really, however I find the thought of shearing off the bolts and losing the front brake or handlebar for that matter(or engine) rather terrifying.
      You should work on using the front brakes more; they stop faster than the rear.

      Comment


        #4
        This thread from the archives discusses the topic at hand...

        Ed

        To measure is to know.

        Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

        Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

        Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

        KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

        Comment


          #5
          Originally posted by Nessism View Post
          This thread from the archives discusses the topic at hand...

          http://www.thegsresources.com/_forum...d.php?t=174771
          Excellent my friend, it was buried among the masses of posts about SS screws, so I will quote you here.

          Originally posted by Nessism View Post
          Metric 10.9 = Suzuki "9" = SAE grade 8
          Metric 8.8 = Suzuki "7" - SAE grade 5
          Metric 4.6 = Suzuki "4" = SAE grade 1 (no marks on head)

          So again, stainless is okay for metric 4.6 or Suzuki "4" bolts, but I would use them for anything else.
          The above is what I was looking for, thanks a bunch.
          So the Suzuki "7" bolts can be replaced with anything higher rated than 8.8
          The one's I'm looking at are 12.9 which have a 50% higher proof load and 100% increase in the minimum tensile yield strength and 50% higher on the max tensile strength over the 8.8 standard.

          Comment


            #6
            Can anyone speak to the markings on the cam chain tensioner bolts? I believe they were unmarked, with Phillips head, but I no longer have the originals.
            Also can anyone speak to the ones that hold the caliper on the caliper bracket? mine were too rusted to make out.
            Also can anyone confirm/speak to the marking or ratings or the ones marked and the '?'

            Thanks!
            1980 GS450.
            Last edited by Guest; 09-21-2011, 01:10 PM.

            Comment


              #7
              I'll try to get into that factory manual today...

              And Ed you posted a thread I saw but had completely forgotten about!
              1982 GS450E - The Wee Beastie
              1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

              sigpic

              450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

              Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

              Comment


                #8
                OK, I'm looking at the bolts that held the breather cover and the valve cover on and it seems like they are all marked with a 7. These don't seem like bolts that would need to be very strong. they also seemed to be included in the SS bolt set from Z1. Can anyone confirm?

                Comment


                  #9
                  Ummm I could've sworn I posted pic's of the torque sheets in this thread the other night? Maybe I was too crook...

                  But yes those are definitely in the Z1 kit...
                  1982 GS450E - The Wee Beastie
                  1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

                  sigpic

                  450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

                  Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

                  Comment


                    #10
                    Originally posted by apopleptic View Post
                    OK, I'm looking at the bolts that held the breather cover and the valve cover on and it seems like they are all marked with a 7. These don't seem like bolts that would need to be very strong. they also seemed to be included in the SS bolt set from Z1. Can anyone confirm?
                    Those bolts tend to break during removal if they seize in place. Mitigating that risk is the only reason I can think of to use high strength there. BTW, using anti-seize on all stainless fasteners is recommended to avoid corrosion due to dissimilar metals.
                    Ed

                    To measure is to know.

                    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                    Comment


                      #11
                      Originally posted by Nessism View Post
                      Those bolts tend to break during removal if they seize in place. Mitigating that risk is the only reason I can think of to use high strength there. BTW, using anti-seize on all stainless fasteners is recommended to avoid corrosion due to dissimilar metals.
                      Yes, I will remember the anti seize. Got a big tube of it ready to go.
                      I read somewhere that the blue thread locker also acts as an anti seize between dissimilar metals?

                      Comment


                        #12
                        Originally posted by apopleptic View Post
                        I read somewhere that the blue thread locker also acts as an anti seize between dissimilar metals?
                        Please do not use thread locker on any bolts, unless the factory service manual calls for it.
                        Ed

                        To measure is to know.

                        Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                        Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                        Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                        KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                        Comment


                          #13
                          Here's what I swore I posted the other night, not sure if it will help or not though:



                          1982 GS450E - The Wee Beastie
                          1984 GSX750S Katana 7/11 - Kit Kat - BOTM May 2020

                          sigpic

                          450 Refresh thread: https://www.thegsresources.com/_foru...-GS450-Refresh

                          Katana 7/11 thread: http://www.thegsresources.com/_forum...84-Katana-7-11

                          Comment

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