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Separating the V&H 4>1 for my GPz750

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    #1

    Separating the V&H 4>1 for my GPz750

    I need to separate the header from the megaphone on the V&H off my GPz750.


    Somewhat rusty and chrome which looks out of place on the no chrome GPz IMO.I need to separate it to use my pipe straitening tool on this.

    And to paint it black to better suit the GPz.Already tried the trio of penetrating oils I have,Lloyd's Moovit,PB Blaster and 50/50 ATF and alcohol.Also tried heat from a propane torch and spraying the ATF/alcohol on it while hot.What else does the GSR brain trust suggest?
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    #2
    how about a large torch and wedge the head pipes and twist the collector when cherry red at the joint?

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      #3
      Propane will not be hot enough. You need oxy acetylene. I had to do the same with my Yosh pipe and the only way was with oxy acetylene, all other attempts failed.
      1978 Gs1085 compliments of Popy Yosh, Bandit 1200 wheels and front end, VM33 Smoothbores, Yosh exhaust, braced frame, ported polished head :cool:
      1983 Gs1100ESD, rebuild finished! Body paintwork happening winter 2017:D

      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.

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        #4
        Great 3 people tell me the same thing(1 on KZR) and I know nobody with an oxy acetylene set up.May have to bite the bullet and pay someone to torch the jointWill try some other things before that though.

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          #5
          You could try using MAP gas (yellow canister) as it gets MUCH hotter than propane.

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            #6
            Originally posted by GSX1000E View Post
            You could try using MAP gas (yellow canister) as it gets MUCH hotter than propane.
            I guess but if I go the torch route the oxy acetylene is the way to go.I was using the propane to try to help the penetrating oil to get drawn into the joint as it cooled.It worked on the stuck swingarm pivot bolt.
            Last edited by Guest; 10-19-2014, 11:44 AM.

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              #7
              Using my slide hammer to get the baffle out I had an unexpected result

              Baffle still isn't out and has barely movedMay have to wreck the baffle to get it out but it will still be less than a new pipe!

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                #8
                Oxalic acid (deck wash) is an excellent derusting sauce. A small package in a plastic garbage can full of water works well.

                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

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                  #9
                  As stated in the OP the plan is to take the chrome completely off or take it to the local U bast it place and rough the chrome up then paint it black.We have oxilc at work so I got some,with permission of courseMay use it to be sure all the rust is gone.
                  Last edited by Guest; 10-19-2014, 07:14 PM.

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                    #10
                    Just tried to put my pipe straightening tool down the collector.There's a divider that won't let it pass

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