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  • Just Purchased XS1100

    Hey everyone! I just purchased a 1980 XS1100 Midnight Special and had a few questions to get my build started. First off I wanted to get the model figured out, I'm assuming it's an XS100LG from the research I've done so far.

    As far as buying things for the bike, what would be some good websites to get parts? I need to do fluids on it so an oil filter and some new fuel filters would be nice. Some of the hoses are a little old and need replacing. Expecually the manifold tubes coming out of the carbs they are hard as a rock and starting to crack.

    I would like to replace the exhaust, it's got an aftermarket on there right now but it's blown out on the muffler and is pretty banged up underneath. It's a 4-1 right now but I would love to go back to the original where it's two 2-1 on each side I just don't know where I would even be able to find headers for it.

    Sorry for the long post, this bike needs work and I have no idea where to start looking for things. I've never owned something this age, my other motorcycle is a 2020 model so finding parts for that is easy šŸ˜‚. I love the bike and I know I'm not going to be able to restore it back to it's original glory but I still want it to be nice again. Please let me know.

  • #2
    To verify the model, which I too suspect is an LG because of the straight spokes on the wheels, find the vin number on the neck of the frame as well as stamped on the engine. If the engine has ever been swapped you will know from the vin number. If the vin's match then you have the original engine. I would think you will find the vin starts with 4H3 and if it does then yes you have an LG. As for buying parts I use Partzilla, Partzilla: OEM Motorcycle Parts, ATV Parts, Marine Parts, Mikes XS Yamaha XS650 Parts & Vintage Yamaha Parts - MikesXS.com, Yambits Yambits : Yambits - Yamaha Parts (if you order from them make sure you get everything you need in one order because of the shipping costs), and of course for hard to find things I shop Ebay.
    I have been using Super Tech 20w50 from Walmart for a while now. The manual calls for 20W40 and Yamaha used to supply it but quit several years ago so most use non synthetic regular conventional oil and the Super Tech is cheap and readily available. There have been several discussions about the use of synthetic in these bike and that it makes the clutch slip, however there are several members that say they use it with no problems. The reason I don't even try it is because the manual states that you should change the oil a lot more frequently then the mileage synthetics are rated for and the loose tolerances on these old bikes tends to contaminate the oil much more quickly then the more modern machines of today. Bottom line is make sure whatever oil you choose is rated for wet clutch use. The middle and final drives have hypoid oil in them and synthetic is fine for use in those.. I use Super Tech 75W 140 from Walmart. Cheapest around. Word of caution... don't drain the oil from the middle and final drives until you verify that you can get the fill plug out first. Depending on when they were last removed they can sometimes be hard to remove. You will be able to find the petcock internal fuel filters on Partzilla as well as on Ebay and other sources. I get my fuel hose from and local vintage motorcycle shop. I just bring a sample of what I have and we match it up for size and diameter. I think you are talking about the intake rubber manifolds bolted to the engine that are cracking. They generally do not crack all the way through and are still working fine as long as you don't have any leaks. If you want to replace them ... be careful of the ones on Ebay and offered by other vendors. Most are made cheaply and the brass vacuum tubes will pull right out of them. I use them but you will find that problem with most of them. I just pull the tubes out and use some good epoxy cement to glue them back in place. You will see the difference in price from genuine manifolds to the chinese knockoffs. Price is about a quarter of the price as the good ones. The cheap ones also don't have the reinforcement found in originals around the base. You need to make sure they are good because as you tune the bike you will be pulling plugs and hoses off of those brass ports over and over. I use Fram CH6002 oil filters. Only because I scored a large batch of them several years ago. You can find them or their equivalent online. Ebay sells some too but I find they are overpriced. Keep a constant search on Ebay for exhaust pipes. They occasionally show up. Best be for Oem is to grab what you can find and have them sandblasted and recoated.
    2 - 80 LGs bought one new
    81 LH
    02 FXSTB Nighttrain
    22 FLTRK Road Glide Limited
    Jim

    Comment


    • #3
      By the way spend some time going through the maintenance section of this site. Many how to's and sources for parts etc. Some defunct by many still active. Hopefully others will chime in on parts sources.
      2 - 80 LGs bought one new
      81 LH
      02 FXSTB Nighttrain
      22 FLTRK Road Glide Limited
      Jim

      Comment


      • #4
        Adding a few suppliers to Cajun31 suggested list:
        For used parts PM member Andreas Weiss.
        Member Geezer makes updated voltage regs and has other electrical parts. http://www.oregonmotorcycleparts.com
        Replacement rubber items can be found at Sumo Rubber in the UK. https://sumorubber.com/xs1100
        NOS parts try Speed and Sport as well. https://speedandsportinc.com
        I've purchased a few hard to find new items from Cruzin Image in Japan. https://www.cruzinimage.net/?s=XS1100
        Len at XJ forever has a catalog of parts with listings for the XS. http://xj4ever.com/catalog/a-catalog-index.html
        Sudco catalog. https://www.sudco.com

        For the carb internal jets and needles use genuine Mikuni parts which you can get from Yamaha dealers.

        Good Luck

        ---Bax
        80 SG, --- Slightly modified with EFI.....

        Comment


        • #5
          Most of my regular sources have already been mentioned except:

          https://www.partsnmore.com/parts/yam...100lg/?filters[fitting]=custom
          https://www.jetsrus.com/index.html

          Someone ought to collect all these links and place them in a sticky note for easy reference.
          -Mike
          _________
          '79 XS1100SF 20k miles
          '80 XS1100SG 44k miles
          '81 XS1100H Venturer 35k miles
          '79 XS750SF 17k miles
          '85 Honda V65 Magna ~7k miles
          '84 Honda V65 Magna 48k miles (parts bike)
          '86 Yamaha VMAX 9k miles

          Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65

          Comment


          • #6
            Originally posted by Radioguylogs View Post
            Most of my regular sources have already been mentioned except:

            https://www.partsnmore.com/parts/yam...100lg/?filters[fitting]=custom
            https://www.jetsrus.com/index.html

            Someone ought to collect all these links and place them in a sticky note for easy reference.
            Yeah Ive already made a bookmark file with all of these websites on my phone and computer šŸ˜‚ thank you so much.

            Comment


            • #7
              Originally posted by cajun31 View Post
              To verify the model, which I too suspect is an LG because of the straight spokes on the wheels, find the vin number on the neck of the frame as well as stamped on the engine. If the engine has ever been swapped you will know from the vin number. If the vin's match then you have the original engine. I would think you will find the vin starts with 4H3 and if it does then yes you have an LG. As for buying parts I use Partzilla, Partzilla: OEM Motorcycle Parts, ATV Parts, Marine Parts, Mikes XS Yamaha XS650 Parts & Vintage Yamaha Parts - MikesXS.com, Yambits Yambits : Yambits - Yamaha Parts (if you order from them make sure you get everything you need in one order because of the shipping costs), and of course for hard to find things I shop Ebay.
              I have been using Super Tech 20w50 from Walmart for a while now. The manual calls for 20W40 and Yamaha used to supply it but quit several years ago so most use non synthetic regular conventional oil and the Super Tech is cheap and readily available. There have been several discussions about the use of synthetic in these bike and that it makes the clutch slip, however there are several members that say they use it with no problems. The reason I don't even try it is because the manual states that you should change the oil a lot more frequently then the mileage synthetics are rated for and the loose tolerances on these old bikes tends to contaminate the oil much more quickly then the more modern machines of today. Bottom line is make sure whatever oil you choose is rated for wet clutch use. The middle and final drives have hypoid oil in them and synthetic is fine for use in those.. I use Super Tech 75W 140 from Walmart. Cheapest around. Word of caution... don't drain the oil from the middle and final drives until you verify that you can get the fill plug out first. Depending on when they were last removed they can sometimes be hard to remove. You will be able to find the petcock internal fuel filters on Partzilla as well as on Ebay and other sources. I get my fuel hose from and local vintage motorcycle shop. I just bring a sample of what I have and we match it up for size and diameter. I think you are talking about the intake rubber manifolds bolted to the engine that are cracking. They generally do not crack all the way through and are still working fine as long as you don't have any leaks. If you want to replace them ... be careful of the ones on Ebay and offered by other vendors. Most are made cheaply and the brass vacuum tubes will pull right out of them. I use them but you will find that problem with most of them. I just pull the tubes out and use some good epoxy cement to glue them back in place. You will see the difference in price from genuine manifolds to the chinese knockoffs. Price is about a quarter of the price as the good ones. The cheap ones also don't have the reinforcement found in originals around the base. You need to make sure they are good because as you tune the bike you will be pulling plugs and hoses off of those brass ports over and over. I use Fram CH6002 oil filters. Only because I scored a large batch of them several years ago. You can find them or their equivalent online. Ebay sells some too but I find they are overpriced. Keep a constant search on Ebay for exhaust pipes. They occasionally show up. Best be for Oem is to grab what you can find and have them sandblasted and recoated.
              Thank you so much for all of the info, I did check out the maintenance section and there is awesome information on there. I can tell we are gonna be best friends throught this build of mine so I thank you for all of your knowledge.

              Comment


              • #8
                Originally posted by Bax View Post
                Adding a few suppliers to Cajun31 suggested list:
                For used parts PM member Andreas Weiss.
                Member Geezer makes updated voltage regs and has other electrical parts. http://www.oregonmotorcycleparts.com
                Replacement rubber items can be found at Sumo Rubber in the UK. https://sumorubber.com/xs1100
                NOS parts try Speed and Sport as well. https://speedandsportinc.com
                I've purchased a few hard to find new items from Cruzin Image in Japan. https://www.cruzinimage.net/?s=XS1100
                Len at XJ forever has a catalog of parts with listings for the XS. http://xj4ever.com/catalog/a-catalog-index.html
                Sudco catalog. https://www.sudco.com

                For the carb internal jets and needles use genuine Mikuni parts which you can get from Yamaha dealers.

                Good Luck

                ---Bax
                Thank you, I don't think the carbs are original but they are mikuni still, is there any way I can tell what model they are?

                Comment


                • #9
                  Napahkiin Carb ID..... It's probably best to just post a few pics of the carbs, someone here will recognize the specifics. Air box side looking down the mouth should get most of it answered. Many of these bikes had a mismatch on the array due to replacement carbs getting swapped in over the years. I think the original LG carbs were BS34iii


                  ---Bax
                  80 SG, --- Slightly modified with EFI.....

                  Comment


                  • #10
                    This thread has some good info and pictures that may help you identify your carbs.
                    Carb Identifier Guide Take 2 - XS11.com Forums

                    Also I would like to point out a useful feature found on the parts supplier partzilla.com. They have a ā€œrelated fitmentā€ section on the individual part number page. Just find the part for your model that you are looking for and then scroll down to the right hand side of the page and you will find a list of other Yamaha models that use that same part. I have found that info to be very helpful when searching for parts from various other sources.

                    Bob's Bikes:
                    79SF, Military theme.

                    Bob's websites:
                    https://projectxs11.wordpress.com
                    https://rucksackgrunt.com

                    Bob's Books:
                    "
                    Project XS11"
                    "Rucksack Grunt"
                    "Small Unit Leadership"
                    "Beatrice B. Goode"



                    Bob's Parts:
                    For Sale Here.

                    Comment


                    • #11
                      Originally posted by Ranger_xs1100 View Post
                      This thread has some good info and pictures that may help you identify your carbs.
                      Carb Identifier Guide Take 2 - XS11.com Forums

                      Also I would like to point out a useful feature found on the parts supplier partzilla.com. They have a ā€œrelated fitmentā€ section on the individual part number page. Just find the part for your model that you are looking for and then scroll down to the right hand side of the page and you will find a list of other Yamaha models that use that same part. I have found that info to be very helpful when searching for parts from various other sources.
                      I hope an administrator is paying attention to your post Bob. It seems that link is missing on this site in the maintenance section. The first version of Steve's post is there but this one would be nice to have as well.
                      Last edited by cajun31; 11-30-2021, 09:35 PM.
                      2 - 80 LGs bought one new
                      81 LH
                      02 FXSTB Nighttrain
                      22 FLTRK Road Glide Limited
                      Jim

                      Comment


                      • #12
                        OK, I think I now have part 2 in the carb section. I only moved the main part, not the comments that came after.
                        Ray Matteis
                        KE6NHG
                        XS1100 E '78 (winter project)
                        XS1100 SF Bob Jones worked on it!

                        Comment

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