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A little jig

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  • #16
    Originally posted by Tinkerer
    Intake or exhaust jig... to either open up or drill mounting studs. Or mill the fins away for contouring from a shop built piece.
    Hmm, pretty close.



    It's used to mount Morini V-twin heads so I can bore out stripped exhaust port threads and TIG weld in a threaded insert.
    Paul Compton
    www.morini-mania.co.uk
    http://www.youtube.com/user/EVguru

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    • #17
      Cool.. I don't drink Ale but a nice Iced Tea with a twist of lemon will do. I have a project coming up and need to make some head bolts for a 400 twin. What should I use to make them from if I can not fine a suitable replacement?
      Wow... where did the time go. I could of swore I was only out there for an hour.

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      • #18
        Originally posted by EVguru
        Hmm, pretty close.



        It's used to mount Morini V-twin heads so I can bore out stripped exhaust port threads and TIG weld in a threaded insert.
        And I was "just" about to guess the very thing.......
        RPease

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        • #19
          Originally posted by RPease
          And I was "just" about to guess the very thing.......
          Yeah, that would have been my next guess too

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          • #20
            Head work on a Harley..Dave

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            • #21
              Originally posted by A.K. Boomer
              I really don't know but guessing on the stability of the rigidity I hope its for milling plastic
              The rigidity is quite adequate to get the job done. There's only about 1/8" to be bored out, so it doesn't take many light passes.
              Paul Compton
              www.morini-mania.co.uk
              http://www.youtube.com/user/EVguru

              Comment


              • #22
                Originally posted by Tinkerer
                Cool.. I don't drink Ale but a nice Iced Tea with a twist of lemon will do. I have a project coming up and need to make some head bolts for a 400 twin. What should I use to make them from if I can not fine a suitable replacement?
                Which 400 twin?
                Paul Compton
                www.morini-mania.co.uk
                http://www.youtube.com/user/EVguru

                Comment


                • #23
                  Originally posted by Tinkerer
                  Cool.. I don't drink Ale but a nice Iced Tea with a twist of lemon will do.
                  Here you go.

                  Paul Compton
                  www.morini-mania.co.uk
                  http://www.youtube.com/user/EVguru

                  Comment


                  • #24
                    Mmmm that'll hit the spot.

                    Actually it a Polaris Indy Snowmobile 2 stroke water cooled. The guys brother yank it apart to do a ring job on it a couple of years ago and snapped a head bolt off while putting it back together... from what I've been told the bolts are no longer a stock item... at least that's what the shop told them. So long story short the guy is giving me the sled I need to pick it up and pull down the bad cylinder to get a better idea of what is what. But if I can't find a replacement or a suitable work around by moding another head bolt... what material do you think I would be best?
                    Wow... where did the time go. I could of swore I was only out there for an hour.

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                    • #25
                      Head bolts/studs generally have rolled threads for strength, so I'm not sure if any material would work for a machined copy. It all depends just how much load it's under. The head studs on my Lister CS were cut mild steel, whilst the Fiat X1/9 needed OEM stretch bolts.
                      Paul Compton
                      www.morini-mania.co.uk
                      http://www.youtube.com/user/EVguru

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                      • #26
                        Well I'll have a better idea after I get it here and the motor yanked out.. thanks. Humm rolling threads I do have a shaper. Make a set of die plates.. heat and roll... wonder if that can be done.
                        Wow... where did the time go. I could of swore I was only out there for an hour.

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                        • #27
                          yeap, the russians used to ship shapers with a set of thread rolling plates. One goes on the fixed jaw of the vice, one on the ram.
                          John Stevenson has a book with the info in it.

                          Dave
                          Just south of Sudspumpwater UK

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