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Thread: Fork Spring Upgrade

  1. #1
    Join Date
    Nov 2016
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    NH
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    Default Fork Spring Upgrade

    Hi All,

    Looking for a little help. I have progressive shocks as my rear suspension and was going to upgrade my fork springs during an upcoming fork seal job. Can anyone help me find fork springs for my bike?? I was looking for some progressive's but at all the sites I'm only given options for rear shocks, never front fork springs when I focus in on an 82 850.

    Help is appreciated!
    -Rich

    1982 GS850GL - WE DID IT! Introduction

    1977 GS750 - Project, running but needs electrical love (lots of it)

  2. #2
    Join Date
    Jun 2005
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    Default

    Fellow member Rich Desmond would appreciate it if you would look at his company, Sonic Springs.

    I have some in my '80 850 and really like them, even better than the Progressives that are in the other GSes here.

    Because of the frame-mounted fairing and my gravitational attraction, I chose the 1.1 rate springs, and am using 10w fork oil. GREAT ride.

    .

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  3. #3
    Join Date
    Nov 2016
    Location
    NH
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    Default

    Quote Originally Posted by Steve View Post
    Fellow member Rich Desmond would appreciate it if you would look at his company, Sonic Springs.

    I have some in my '80 850 and really like them, even better than the Progressives that are in the other GSes here.

    Because of the frame-mounted fairing and my gravitational attraction, I chose the 1.1 rate springs, and am using 10w fork oil. GREAT ride.

    .
    I shall take a look! Thanks!
    -Rich

    1982 GS850GL - WE DID IT! Introduction

    1977 GS750 - Project, running but needs electrical love (lots of it)

  4. #4
    Join Date
    May 2014
    Location
    Alberta, Canada
    Posts
    849

    Default

    Another satisfied Sonic buyer here, service was excellent and prices very reasonable. The biggest reason to go with a straight rate spring over Progressive Suspension springs is you can choose the correct rate for your bike and riding. PS fork springs are too soft for the vast majority of the GS bikes. They are stiffer than OEM, so they are an improvement over original but they are not even close to being correct overall. Go with the correct rate Sonic springs, run zero air pressure and set the oil level according to Rich's recommendations and you will be very happy with the result.


    Mark
    1982 GS1100E
    2006 GSXR 1000
    1998 ZX-6R

  5. #5
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    Default

    Quote Originally Posted by mmattockx View Post
    Another satisfied Sonic buyer here, service was excellent and prices very reasonable. The biggest reason to go with a straight rate spring over Progressive Suspension springs is you can choose the correct rate for your bike and riding. PS fork springs are too soft for the vast majority of the GS bikes. They are stiffer than OEM, so they are an improvement over original but they are not even close to being correct overall. Go with the correct rate Sonic springs, run zero air pressure and set the oil level according to Rich's recommendations and you will be very happy with the result.

    Mark
    Super mega-dittos on that. All my bikes are wearing Sonic springs.

    One of the things you notice immediately with the correct straight rate springs is that there's a lot less brake dive. Even if you ride like a terrified granny, better, safer braking is always a good thing.
    1983 GS850G, Cosmos Blue.
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  6. #6
    Join Date
    Nov 2016
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    NH
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    Default

    Thank you for all the info! Following you guys hasn't led me wrong yet, so Sonic Springs have been ordered
    -Rich

    1982 GS850GL - WE DID IT! Introduction

    1977 GS750 - Project, running but needs electrical love (lots of it)

  7. #7
    Join Date
    Dec 2012
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    Default

    Sonic springs....I must order some too!

    Post pics of your rebuild!


    Ed
    GS750TZ V&H/4-1, Progressive Rear Shocks, Rebuilt MC/Caliper & new single-braided front line, Tarozzi Forks Stabilizer[Seq#2312]
    GS750TZ Parts Bike [Seq#6036]
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  8. #8
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    Quote Originally Posted by GSXR7ED View Post
    Sonic springs....I must order some too!

    Post pics of your rebuild!


    Ed
    Thought you already did...what's the hold up man lol.
    MrBill
    1980 GS 750E Bought new in Feb of 1980
    Been a GSR member on and off since April 2002

    Stuff I've done to my bike 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

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