Announcement

Collapse
No announcement yet.

Building a vintage track bike

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #46
    anyone use these guys? They seem like a good price

    Comment


      #47
      I have seen both pbi and http://www.jtsprockets.com/ mentioned on OSS with good feedback.
      2@ \'78 GS1000

      Comment


        #48
        I got an offset one for my Bandit rear end set up on a GS1100 from Katman. http://www.suzuki-katana.com/
        Current Rides: 82 GS1100E, 00 Triumph 955 Speed Triple, 03 Kawasaki ZRX1200, 01 Honda GL1800, '15 Kawasaki 1000 Versys
        Past Rides: 72 Honda SL-125, Kawasaki KE-175, 77 GS750 with total yosh stage 1 kit, 79 GS1000s, 80 GS1000S, 82 GS750e,82 GS1000S, 84 VF500f, 86 FZR600, 95 Triumph Sprint 900,96 Triumph Sprint, 97 Triumph Sprint, 01 Kawasaki ZRX1200, 07 Triumph Tiger 1050, 01 Yam YFZ250F
        Work in progress: 78 GS1000, unknown year GS1100ES

        Comment


          #49
          Originally posted by limeex2 View Post
          I got an offset one for my Bandit rear end set up on a GS1100 from Katman. http://www.suzuki-katana.com/
          Same here, Rob is in BC to make things even better
          1978 Gs1085 compliments of Popy Yosh, Bandit 1200 wheels and front end, VM33 Smoothbores, Yosh exhaust, braced frame, ported polished head
          1983 Gs1100ESD, rebuild finished! Body paintwork happening winter 2017

          I would rather trust my bike to a technician that reads the service manual than some backyardigan that THINKS HE KNOWS how to fix things.

          Comment


            #50
            Originally posted by azr View Post
            Subscribed.......... If you need a regular length 1100 swingarm I'm got a few of them, including one that has all the tabs taken off in prep for the track.
            I wouldn't mind one if you're still willing to let one go!

            Comment


              #51
              one_civic, if you decide you want a standard length GS1100E swingarm, I have a few here for now that I would be willing to trade you even up, pending shipping costs across the Canada USA border. The shortened arm would go great on my GS425 racer build.
              I love the GS1100E arm on my 750, the extra length gave it substantial more rigidity and high speed stability, and only made cornering noticeably different on those ultra tight 10-15mph hairpin turns (I also added 13.375" long shocks at the same time as swingarm install, big improvement in turn in with that).
              Going longer will pull your shocks back further, adding more rake and trail as the rear end will get dropped down and alter the front end geometry, which will make it handle like a pig if you don't increase the rear shock length to get good rake and trail back.

              The other big benefit of a longer swingarm is substantially improved corner exit geometry under acceleration. Getting the proper swingarm angle of 7 to 11 degrees is also pretty critical here. With a shorter swingarm, your swingarm angle changes more drastically as compared to the same amount of suspension travel with a longer swingarm. This gives your rear end the tendency for the swingarm geometry to go from steeper where it is resisting squatting (anti-squat) to the angle more rapidly/drastically changing under acceleration and actually giving you "pro-squat" where your rear end squats more easily, raking out your front end geometry under the power of acceleration out of a turn, & hence causing you to go wide exiting the turn and have to back off the throttle a bit. This is a well known tendency when running a shorter swingarm and a properly set up suspension.

              Everything can be a compromise on these older race bikes in these types of scenarios.shorter swingarm = faster corner apexing, longer swingarm = faster corner exit. Modern bikes have both since the frame and engine are designed to have a very long swingarm yet a fairly short wheelbase.
              Lots to think about...

              If you ever look at modern swingarm swaps, you will notice that they are all substantially longer for this reason. The pivots are however moved more forward in the frames, & the gearboxes are made tighter to the engine to afford this even more.
              Last edited by Chuck78; 09-18-2016, 09:22 PM.
              '77 GS750 920cc heavily modded
              '97 Kawasaki KDX220R rugged terrain ripper!
              '99 Kawasaki KDX220R​ rebuild in progress
              '79 GS425stock
              PROJECTS:
              '77 Suzuki PE250 woods racer
              '77 GS550 740cc major mods
              '77 GS400 489cc racer build
              '76 Rickman CR1000 GS1000/1100
              '78 GS1000C/1100

              Comment


                #52
                Originally posted by Old Colt View Post
                Way back when these bikes were new I raced my '79 GS550. It was not stock.



                These pics were taken a decade ago.
                About darn time we see a pic of that GS550 of yours, Colt!
                Is that a Yoshimura exhaust?
                Still have those Fox Shocks on it? If you ever are considering swapping different shocks, please notify me first as I'd give you top dollar for a set of Fox piggybacks. I'm looking for a 3rd set currently.
                '77 GS750 920cc heavily modded
                '97 Kawasaki KDX220R rugged terrain ripper!
                '99 Kawasaki KDX220R​ rebuild in progress
                '79 GS425stock
                PROJECTS:
                '77 Suzuki PE250 woods racer
                '77 GS550 740cc major mods
                '77 GS400 489cc racer build
                '76 Rickman CR1000 GS1000/1100
                '78 GS1000C/1100

                Comment


                  #53
                  Life happens.
                  The bike is up for sale.
                  glws, Civic.

                  2@ \'78 GS1000

                  Comment


                    #54
                    I hate it when that has to happen....

                    Too bad it's in Canada or else I'd be trying to get a friend to buy it. "Importing" complete bikes is a pain...
                    '77 GS750 920cc heavily modded
                    '97 Kawasaki KDX220R rugged terrain ripper!
                    '99 Kawasaki KDX220R​ rebuild in progress
                    '79 GS425stock
                    PROJECTS:
                    '77 Suzuki PE250 woods racer
                    '77 GS550 740cc major mods
                    '77 GS400 489cc racer build
                    '76 Rickman CR1000 GS1000/1100
                    '78 GS1000C/1100

                    Comment


                      #55
                      Thanks Steve, I have someone interested in some of the parts, i.e.engine, tank, body parts, Chuck if I decide to part it, I may take you up on that offer for the swing arm,

                      Unfortunately my hands are tied and I won't be able to afford track days, camping, travelling time next year with my new born. I really want this bike to go to someone who appreciate's these old machines. It runs great, just won't have the time next year for the track

                      I may decide to part it and if I do, I'll let the forum have first dibs.
                      Last edited by Guest; 09-22-2016, 08:26 AM.

                      Comment


                        #56
                        Checked Expensive car

                        One of my friend's Albert owner of (Wordsiseek.com) is fond of racing. I will personally invite him to be a part of this forum to share his experiences about racing. Have you tried Koenigsegg CCX for racing? It has 245+ mph speed according to WIS post on world most expensive car.
                        Last edited by Guest; 10-15-2016, 03:35 AM.

                        Comment


                          #57
                          Originally posted by Chuck78 View Post
                          I hate it when that has to happen....

                          Too bad it's in Canada or else I'd be trying to get a friend to buy it. "Importing" complete bikes is a pain...
                          If it has the stuff you want and need, why not bring it over in pieces? Like a customs guy is gonna check a bunch of greasy parts. Get a extremly ratty 550 in the US for cheap with a straight frame and title and there ya go.
                          Current Rides: 82 GS1100E, 00 Triumph 955 Speed Triple, 03 Kawasaki ZRX1200, 01 Honda GL1800, '15 Kawasaki 1000 Versys
                          Past Rides: 72 Honda SL-125, Kawasaki KE-175, 77 GS750 with total yosh stage 1 kit, 79 GS1000s, 80 GS1000S, 82 GS750e,82 GS1000S, 84 VF500f, 86 FZR600, 95 Triumph Sprint 900,96 Triumph Sprint, 97 Triumph Sprint, 01 Kawasaki ZRX1200, 07 Triumph Tiger 1050, 01 Yam YFZ250F
                          Work in progress: 78 GS1000, unknown year GS1100ES

                          Comment


                            #58
                            Is it a 5 or 6 cush drive type? If 5 then switching to the GS550 sprocket drive might help. Some of the Suzuki 6 are also slimmer too.

                            I have run with a 6mm spacer behind a "conversion" sprocket (which has about 2mm lump that is meant to go outside but I ran it inside as it's splined).

                            The only problem at that point was no room on the splines for a lock washer so I used red loctite. Probably means heat will be needed to remove the sprocket to change so no good if you want to do regular changes. Maybe you could drill and lockwire instead somehow but I imagine the splined shaft is pretty hard...

                            Main reason for doing this was I was 520 (offset sprockets are only commonly available in 530 & I didn't have room for a 530 without altering the frame) and cost (Offset sprockets are expensive).
                            Last edited by salty_monk; 10-07-2016, 07:38 PM.
                            1980 GS1000G - Sold
                            1978 GS1000E - Finished!
                            1980 GS550E - Fixed & given to a friend
                            1983 GS750ES Special - Sold
                            2009 KLR 650 - Sold - gone to TX!
                            1982 GS1100G - Rebuilt and finished. - Sold
                            2009 TE610 - Dual Sporting around dreaming of Dakar.....

                            www.parasiticsanalytics.com

                            TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

                            Comment


                              #59




                              1980 GS1000G - Sold
                              1978 GS1000E - Finished!
                              1980 GS550E - Fixed & given to a friend
                              1983 GS750ES Special - Sold
                              2009 KLR 650 - Sold - gone to TX!
                              1982 GS1100G - Rebuilt and finished. - Sold
                              2009 TE610 - Dual Sporting around dreaming of Dakar.....

                              www.parasiticsanalytics.com

                              TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/

                              Comment


                                #60
                                Originally posted by one_civic View Post
                                So I laser lined my front drive sprocket to my rear sprocket carrier and I need to machine 1/2" or 12.7mm off the rear carrier and shim out my front sprocket 1/8" or 3mm to have proper chain alignment. The only thing that kind of worries me is that there will not be much material left on the rear sprocket carrier, so.... I'm thinking of only machining off 3/8" or 9.5mm and shimming the front to 1/4" or 6mm. My question is, has anyone used a front drive 530 15t sprocket shimmed outward 6mm? Was there enough of the sprocket on the output shaft spline? Pics for clarity, lol [IMG][/IMG]
                                Use a GS500 rear sprocket carrier. No machining required (except for the axle spacers, of course) or offset front sprocket. I am currently building a GS1000 project, also with 1st generation GSX-R wheels. Currently the rear wheel is wearing a 140/70 tire, but, by the looks of things you could probably run a 150-section tire on the back and still clear the chain.
                                Last edited by Guest; 12-07-2016, 03:46 AM.

                                Comment

                                Working...
                                X