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    #16
    If the tire goes flat enough to come off the rim, it's not like the bike will be upright for long anyway. You might stay upright if it's the rear that suddenly goes. Maybe. You never know. ATTGATT.
    Last edited by Dogma; 01-22-2017, 01:25 AM.
    Dogma
    --
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    '80 GS850 GLT
    '80 GS1000 GT
    '01 ZRX1200R

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      #17
      Ok this thread reads..... Need expert answer re: 80 GS850G wheels

      Most of what i read is hear say.

      "Many guys here on the GSR have converted tube type wheels to tubeless by enlarging the valve stem hole. These wheels then are equivalent to the early tubeless wheels being sold by the OEM's." WTF? U dont need to enlarge that hole for the correct tubeless fitting.

      "I'm no expert but I thought only the spoked wheels needed tubes." You can silicone the spokes up enough to run them tubeless if ure crazy enough

      "The 'MT' denotes the correct bead seat profile for running tubeless tires" Not sure where you read that. The current owner of the bike tyre place where i worked doesnt know. maybe you can let us know please.

      So in other words unless its cast with Tubeless Tyre Applicable i wouldnt fit it it tubeless ever. Too many things out there trying to kill you and you adding your self to that list..

      Oh and i better add the Need expert answer re: 80 GS850G wheels questioning was answered by a expert. Worked in motorcycle tyre shop from 78-91 then various motorcycle shops till 2010. But what do i know. Thats the answer. but we are all different so its only my answer. TC

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        #18
        Repeating myself here but both Suzuki and Kawasaki sold "Tubeless Tire Applicable" wheels (front to be specific) that did NOT have the extra rim bumps common to tubeless wheels. Apparently these companies did not feel these features were critical to the design, at that point in time anyway. These wheels differ from the tube type wheels though in that they have a flat machined in and around the valve stem area. This allows the tubeless valve stems to have a nice flat area to seal against.

        The following photos are from brwinger and show how to mod a tube type wheel to accept a tubeless valve stem. Converting your tube type wheels like that effectively make them just like the early tubeless wheels both Suzuki and Kawasaki sold.

        In later years both of these manufacturers did add the extra safety bumps to the rim profile because it's a positive safety feature. Does that mean that the early wheels are unsafe? No.



        Last edited by Nessism; 01-22-2017, 01:06 PM.
        Ed

        To measure is to know.

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

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          #19
          The following photo shows what the safety bumps look like. Clearly, these wheels are safer since they hold the tire on the rim bead in case of deflation. This safety feature will function the same though regardless of whether or not there is a tube inside or running tubeless.

          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


            #20
            Jeez, I wasn't trying to make anyone mad here. Nessism, my wheel doesn't have the bumps shown so nicely in your photos but it does have an already flat spot that accepted my replacement valve perfectly. The inner rubber gasket for the valve stem was a perfect fit for it. The tire I pulled off the wheel was a Continental super twin (tubeless) and has the matching tire on the rear (tubeless). Sharpy, I hear your concerns and will take that into consideration as well. I won't be getting on this bike for months as I rebuild it.
            I appreciate everyone's feedback.

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              #21
              Here is a relevant article that I found from a 1986 Cycle World. This should explain and verify the MT does denote motorcycle tubeless (in my case without the bumps)

              Comment


                #22
                The Cycle World article states that MT = Motorcycle Tubeless. There are a lot of GS wheels that have this denation, but came with tubes inside. Gotta be careful about the valve stem hole is all if deciding to go tubeless.
                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


                  #23
                  Interesting thread. Both wheels on mine are 'tubeless tyre applicable' and both carry the MT designation in the rim size however the shop that does my tyres called my attention to the fact that there was a tube in the front and they replaced it because the hole was too small for the other valve.
                  97 R1100R
                  Previous
                  80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

                  Comment


                    #24
                    Originally posted by Peter Buehner View Post
                    Jeez, I wasn't trying to make anyone mad here.

                    I appreciate everyone's feedback.
                    That's how we old guys learn around here...I don't want to label it...Just a school of hard knocks.

                    In the end, you get feedback and learn something. Anything else is just opinion. Keep up the good work!


                    Ed
                    GS750TZ V&H/4-1, Progressive Shocks, Rebuilt MC/braided line, Tarozzi Stabilizer[Seq#2312]
                    GS750TZ Parts Bike [Seq#6036]
                    GSX-R750Y (Sold)

                    my opinion shouldn't be taken as gospel or in any way that would lead you to believe otherwise (30Sep2021)
                    Originally posted by GSXR7ED
                    Forums are pretty much unrecognizable conversations; simply because it's a smorgasbord of feedback...from people we don't know. It's not too difficult to ignore the things that need to be bypassed.

                    Comment


                      #25
                      Originally posted by Brendan W View Post
                      Interesting thread. Both wheels on mine are 'tubeless tyre applicable' and both carry the MT designation in the rim size however the shop that does my tyres called my attention to the fact that there was a tube in the front and they replaced it because the hole was too small for the other valve.
                      If thats the case they ripped you off. There are many tubeless stems that will fit in the standard hole that the same as a tube. Just because they didnt have one means they sold you a tube. This is very similar to the standard Suzuki one.... http://cdn1.bikebandit-images.com/pr...lessvlvstm.jpg

                      Comment


                        #26
                        Originally posted by sharpy View Post
                        If thats the case they ripped you off. There are many tubeless stems that will fit in the standard hole that the same as a tube. Just because they didnt have one means they sold you a tube. This is very similar to the standard Suzuki one.... http://cdn1.bikebandit-images.com/pr...lessvlvstm.jpg
                        I'll talk to them next time the front is off. If they ripped me off it was unintentional. They loan me stuff from their workshop in return for a nominal donation to charity and they have hush hush pay when you can afford it schemes running for some less well off older riders that they think no one knows about but the bush telegraph works.
                        97 R1100R
                        Previous
                        80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

                        Comment


                          #27
                          Thanks for posting those photos! I almost forgot I had them. The tool for facing the valve stem seat is called a counterbore and pilot. It's a 5/8" counterbore with a 5/16" pilot (or 16mm and 8mm if you speak metric.) This tool creates a nice flat face on the inside to that the valve stem can seal.

                          In the photo of the rim, you can see that there is indeed no retention lip. That wheel is from a 1982 GS1100G and is marked "Tubeless Tire Applicable". It actually didn't need machining to install a tubeless valve stem, but it was what I had lying around so I used it to demonstrate how the tool worked by making a very light cut.

                          Let me put it this way: I have helped several people convert originally tubed cast Suzuki wheels to tubeless. I've also seen many more converted. I have not heard of any issues. However, I would never actually recommend it to anyone. It's entirely up to the owner and what you're comfortable with. If you're the least bit uncomfortable with converting, then install a tube and go ride.

                          If you feel you want to convert, make your own judgement as to risks. If you decide to go ahead, do it correctly with a motorcycle-specific valve stem which fits the original hole without drilling (I'm personally not comfortable drilling a rim and installing a car valve stem, although some have done this with no trouble), and make sure the inside face is clean and flat so that the rubber seal on the valve stem will seal correctly.


                          Originally posted by Nessism View Post
                          Repeating myself here but both Suzuki and Kawasaki sold "Tubeless Tire Applicable" wheels (front to be specific) that did NOT have the extra rim bumps common to tubeless wheels. Apparently these companies did not feel these features were critical to the design, at that point in time anyway. These wheels differ from the tube type wheels though in that they have a flat machined in and around the valve stem area. This allows the tubeless valve stems to have a nice flat area to seal against.

                          The following photos are from brwinger and show how to mod a tube type wheel to accept a tubeless valve stem. Converting your tube type wheels like that effectively make them just like the early tubeless wheels both Suzuki and Kawasaki sold.

                          In later years both of these manufacturers did add the extra safety bumps to the rim profile because it's a positive safety feature. Does that mean that the early wheels are unsafe? No.

                          1983 GS850G, Cosmos Blue.
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                            #28
                            almost as controversial as an oil thread.
                            1983 GS 1100 ESD

                            Comment


                              #29
                              Originally posted by greg78gs750 View Post
                              almost as controversial as an oil thread.
                              Did someone say Oil Thread? I love a good oil debate! Haha ☺
                              My Motorcycles:
                              22 Kawasaki Z900 RS (Candy Tone Blue)
                              22 BMW K1600GT (Probably been to a town near you)
                              82 1100e Drag Bike (needs race engine)
                              81 1100e Street Bike (with race engine)
                              79 1000e (all original)
                              82 850g (all original)
                              80 KZ 650F (needs restored)

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                                #30
                                Basically. If you work in the bike industry and have a direct concern for your customers (and legal) always do how the OEM made there wheels. Its bad enough when you tell them over and over new tyres are slippery and they still throw it down the road. Thank god no cops ever showed up asking about who fitted the tyres. Yes, modify you bike but be aware of the results.

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