Help choosing a spring rate for the GK

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  • Chuck78
    Forum Sage
    Past Site Supporter
    • Aug 2012
    • 3692
    • Columbus, Ohio
    #16
    I think the stiffest RaceTech has for the GK 41's is1.1kg/mm also. The GK is not in their drop down menus, but if you email, they will tell you which gold valve emulators and springs fit the GK.
    Last edited by Chuck78; 12-26-2017, 03:18 PM.
    '77 GS750 920cc heavily modded
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      • thebrandonbeezy
        Forum Sage
        • Aug 2016
        • 1233
        • vero beach
        #17
        Originally posted by Nessism
        Spacers don't increase spring rate, just preload. You can expect to install the springs and then add spacers to get the preload you desire which affects ride height.

        The Bandit 1200 springs (or similar) are probably the ones you need.. Rich will hook you up.
        Bandits run 43mm fork tubes which are longer.
        89/97 (maybe newer idk) kat 600 run 41mm tubes the same length as standard gs1100g forks. Not sure the length on the gk forks.
        I build Pipers

        https://farm5.staticflickr.com/4842/...b592dc4d_m.jpg

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          • RichDesmond
            Forum Sage
            Past Site Supporter
            • Jul 2011
            • 2757
            • NoVa
            #18
            Originally posted by Chuck78
            I think the stiffest RaceTech has for the GK 41's is1.1kg/mm also. The GK is not in their drop down menus, but if you email, they will tell you which gold valve emulators and springs fit the GK.
            Originally posted by thebrandonbeezy
            Bandits run 43mm fork tubes which are longer.
            89/97 (maybe newer idk) kat 600 run 41mm tubes the same length as standard gs1100g forks. Not sure the length on the gk forks.
            The GK takes the same springs that a lot of other big bikes from that era with 41mm forks. (FJ1100/1200, Kaw Concours) We have 1.2kg/mm listed in the catalog, although most people will be better off with the 1.1s.
            '20 Ducati Multistrada 1260S, '93 Ducati 750SS, '01 SV650S, '07 DL650, '01 DR-Z400S, '80 GS1000S, '85 RZ350

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              • Guest
                #19
                Hey all.

                It as been a while but I am back at it.





                Tomorrow I will install the springs.

                But I can't find which way they go. I had read a post long-while-ago about that and can't find it again.


                Darn, I just realized I need to go out and get oil.
                Last edited by Guest; 01-18-2018, 10:01 PM.

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                  • Guest
                    #20
                    Ok.

                    I found something about unsprung weight and it doesn't really matter.
                    I choose tightly wound down.

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                      • Redman
                        Forum LongTimer
                        Past Site Supporter
                        Super Site Supporter
                        • Mar 2004
                        • 13765
                        • Michigan, west Michigan
                        #21
                        H-G,

                        Have you told us about your bike work platform.....?

                        .
                        Bikes​
                        Had 650G & 850G. GK since 2005. BOTM 850G 6/2024 , GK 9/2015​

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                          • Guest
                            #22
                            Originally posted by Redman
                            H-G,

                            Have you told us about your bike work platform.....?

                            .
                            Hi Redman.

                            I had at the time.

                            The tread seems to be gone. There are pictures on Photobucket but they are now useless.

                            I will load some up and be right back.

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                              • Guest
                                #23
                                Bike Lift Le Lumberjack
                                https://imgur.com/a/d4gWS
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                                At the time I told the story of the build. Now it's just memory. I have a hard time thinking that I built that.

                                From my photo album I built it in January 2015. No plans I just knew what I wanted. And improvised as I went.

                                The piston came from an engine crane.


                                Here are a few build pictures. A medieval type construct.

                                At the time I called it the Lumber-Jack.

                                Now it sports rounded corners, a vise on one corner, a power bar and many oil stains.







                                The pictures don't quite show how it stays up but it can't come down. It's solid.

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