low speed wobble

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  • bruizer
    Junior Member
    • Jan 2012
    • 9

    low speed wobble

    any simplified way to to drive line alignment on rubber mount 85 flh replaced front mount installed primo rivera stiffey in rear swing arm half assed followed factory service manual bike handles ok at speed but have low speed wobble if I let go of yhe bars at 30 mph don't recall issue previously tanks fur any info.
  • Tattooo
    Senior Member
    • Sep 2012
    • 12407

    #2
    Originally posted by bruizer
    installed primo rivera stiffey in rear swing arm half assed followed factory service manual
    ^^^^^^ Explain the above?????^^^^ What does half ass mean?????

    Comment

    • laeljon
      Member
      • Dec 2016
      • 92

      #3
      My low speed wobble was caused by Allen bolts backing out on rear hub....red loctite took care of that.

      Comment

      • TriNortchopz
        Senior Member
        • Dec 2017
        • 3266

        #4
        I see this kit:
        Rivera Primo The Stiffey Swingarm Stabilizer Bushings 1195-0001
        Click image for larger version

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        and this one review:
        "Installed easy did tighten up bike. But vibration was so bad after 100 miles I took out!!"



        Install info here from bikernet:

        Stiffey Installation from Rivera-Primo
        The First Quick-Install Touring Stabilizer
        "Just back from my first ride. I noticed a more solid characteristic to the ride, less sway, and tighter handling, but I did notice increased vibration. I'll report in on further developments, as I cover more miles. I only noticed the increased vibration upon initial acceleration. I need to try some distance miles, like ride to Arizona and never come back"...--Bandit
        Evidently Russ Romero had another stabilizing notion. He designed an off-center alignment cap. It fits into the stock rubber mount, inside the pillow block, and tightens the ability of the swingarm to move laterally. Russ worked with Ben Kudon at Rivera-Primo for testing and manufacturing.


        and a good discussion on this 2010 thread here:
        Rivera Primo Stiffey Swingarm Stabilizer??
        ..."I elected to put in the Stiffey bushings. The left side went in quite well using the thicker of the spacers on top of the Stiffey. You have to make sure you clock the bushing and use only finger force to put it in. If it's hard to put in, you don't have it clocked right. They installed really easily with just taking off the rider floorboards, and removing the pillow block. Do only one side at a time. THEY say that if you take both side apart at the same time the swingarm will become misaligned. For the grins and giggles I also checked my rear wheel alignment after the install. There was no change. Literally you can use a rachet, socket and 1/2 hour and you are done. The right side was a different story as the retainer/pillow block was right behind the exhaust pipe. I had to loosen the pipe to take the block out and install the Stiffey.

        I fired up the bike. OMG did that thing vibrate! I mean it vibrated! Idle to two grand it's almost like a paint shaker. This was one of the complaints I had read about but elected to try them anyway. As soon as I got up to speed the vibration was almost unnoticeable. Before anyone mentions this, at the same time I switched out the worn out front motor mount.
        BUT, what I did notice was that the whole rear end had stiffened up..."
        Touring Models - Rivera Primo Stiffey Swingarm Stabilizer?? - Anybody here have these swingarm bushings installed in their bikes? I have a 1990 FLHTCU that wallows in high speed turns over 70mph. From what I read.. its because of a rear steer problem directly related to swingarm play. My bike has 63K on it and I am...



        and interesting comments here:
        "True tracks work well and they work to make new bushings last longer.
        But they won't do much with worn bushings and swingarm clevblocks, and a 98 would likely have worn or leaking cleveblocks.

        The best is boring out the transmission case and updating the pivot to the current 3/4 shaft and sperical swingarm bearings and loosing the swingarm plastic/rubber altogether, new bushings side and front, realigning the driveline, and a true track type setup for that rear link making it a 3 point system like Eric Buell designed the frame to use, but harley omitted.

        I think someone makes a 5/8 spherical bearing swingarm setup since boring the trans case is a job.
        Low air in suspension and lowering kits don;t help."
        If buildin' old school choppers was easy, anyone could do it... ain't nobody said it's gonna be easy...

        Comment

        • farmall
          Senior Member
          • Apr 2013
          • 9983

          #5
          Rubber mounts trade reduced vibration for reduced control of the drivetrain mass and reduced control of the swingarm and rear tire. A rigid frame/engine connection will always handle better because it will always be stiffer all things being equal. What's left is finding a balance.

          Follow manual correctly. Make sure front end is serviced and the triple clamps are correctly torqued per manual. "Fallaway" is a term you'll get familair with. Tire pressure must be right too. Everything works together.

          The bike is older than dirt so I'd do what I did on my older-than-dirt (1988 is ancient history) FXR (same mounts and swingarm) and replace all the the wear parts as TNC mentions above. That includes the stabilizing links if worn (they are not aircraft rod ends but basically lawnmower parts).

          Harley changed a lot of parts over the years because their early baggers didn't handle very well. vtwinforum and harleytechtalk forums have the best consolidated bagger suspension upgrade info I've seen. I studied them heavily when doing my FXR since so many parts match.

          Search "Harley bagger wobble" for much info on this common problem.
          Last edited by farmall; 06-07-2018, 8:28 AM.

          Comment

          • bruizer
            Junior Member
            • Jan 2012
            • 9

            #6
            low speed wobble

            tanks for the info guess I will be ridin my rigid pan while I sort it ole lady likes bagger cuz we are also older than dirt.tanks again

            Comment

            • bruizer
              Junior Member
              • Jan 2012
              • 9

              #7
              half assed followed Harley shop manual as far as engine alignment didn't use 2 6ft straightedges just did swingarm align and made sure rear belt stayed centered rotating rear wheel in the forward and rearward directions after adjusting front and upper stabilizers

              Comment

              • TriNortchopz
                Senior Member
                • Dec 2017
                • 3266

                #8
                Originally posted by bruizer
                half assed followed Harley shop manual as far as engine alignment didn't use 2 6ft straightedges just did swingarm align and made sure rear belt stayed centered rotating rear wheel in the forward and rearward directions after adjusting front and upper stabilizers
                Did that help reduce the wobble?

                Here is a thread, Touring Frame Alignment, where the OP asked for ideas for a long straightedge:

                ..."I want to perform an alignment, but am not too crazy about spending $350 plus for the tools. The next best option is to use a straight edge and align the rear wheel to the front wheel. Any suggestions for a straight edge that is five feet long?"

                ga_guy replied "I used strings to check alignment and the only adjustment I needed to do was rear wheel axle to swing arm axle alignment, which is easy to do.
                Swing arm is attached to transmission and alignment is probably needed every time transmission is removed.
                Pensil behind front wheel has to be as long as rear tire wide or slightly longer (1/8")
                "
                Frame/Suspension/Front End/Brakes - Touring Frame Alignment - 2003 Road King Had my belt/trans pulley off a short time ago. Since then, it seems as if the bike has vibration issues at freeway cruising RPMs. Also, I used to be able to ride the bike indefinately with the cruise control on and no hands. It would just go...

                (Can't get fotofuckit pictures from that thread) ga_guy included this link; Chassis Alignment Basics
                If buildin' old school choppers was easy, anyone could do it... ain't nobody said it's gonna be easy...

                Comment

                • Tattooo
                  Senior Member
                  • Sep 2012
                  • 12407

                  #9
                  I've always used two 8ft light bulbs... It's easier than a damn string......It works great.....

                  Comment

                  • ChopperDani
                    Senior Member
                    • Apr 2016
                    • 149

                    #10
                    or you can use your moms underwear as long ass string.....then again it might be to big

                    Comment

                    • DustyDave
                      Super Moderator
                      • Oct 2012
                      • 2015

                      #11
                      I thought everybody went to laser levels when the price dropped under $40. I just shoot each side of the rim and mark the floor under the neck then shoot each side of the neck, mark and measure. If it measures the same on both sides you are ready to ride.
                      Dusty
                      Driving that train, high on cocaine
                      Casey Jones you better, watch your speed
                      Trouble ahead, trouble behind
                      And you know that notion just crossed my mind​

                      Comment

                      • Tattooo
                        Senior Member
                        • Sep 2012
                        • 12407

                        #12
                        Originally posted by DustyDave
                        I thought everybody went to laser levels when the price dropped under $40. I just shoot each side of the rim and mark the floor under the neck then shoot each side of the neck, mark and measure. If it measures the same on both sides you are ready to ride.
                        Dusty
                        LOL Hell that's to easy..... That's for people without a flip phone....

                        Comment

                        • DustyDave
                          Super Moderator
                          • Oct 2012
                          • 2015

                          #13
                          Originally posted by Tattooo
                          LOL Hell that's to easy..... That's for people without a flip phone....
                          When I bought the Laser Level was almost a year before I upgraded to my first flip phone. The lasers are so cheap now I'm almost embarrassed to admit that I paid dam near $40 for mine.
                          Dusty
                          Driving that train, high on cocaine
                          Casey Jones you better, watch your speed
                          Trouble ahead, trouble behind
                          And you know that notion just crossed my mind​

                          Comment

                          • Tattooo
                            Senior Member
                            • Sep 2012
                            • 12407

                            #14
                            Originally posted by DustyDave
                            When I bought the Laser Level was almost a year before I upgraded to my first flip phone. The lasers are so cheap now I'm almost embarrassed to admit that I paid dam near $40 for mine.
                            Dusty

                            You know after thinking about it, Hell I own a laser that you align your chain with.... LOL I've never used it....

                            Comment

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