/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Pinned Rear Shock Data & Swaps

Discussion in 'Tech Tips' started by maelstrom, Aug 20, 2018.

Page 1 of 2
  1. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Edit:
    I made a web page for us to store our Grey Bike shock info.
    https://litetek.co/Info_RearShock_GreyBikes.html
    Please contribute when you have a shock lying around or in your hand and it will benefit everyone. The stroke of the shock is very important so don't ignore it when you are looking for a replacement.


    Maybe a good idea to keep and/or list some resources for those looking to do shock swaps etc.
    So with that in mind here is YSS's, (Thai shock manufacturer), listing page, and it is quite comprehensive. Seems to include most of the 400 grey bikes but not all of the 250s. The MC22 and ZZR250 are there.
    https://www.yss.co.th/applicationlist.php

    And here is the definition of their product code https://www.yss.co.th/product-code.php unfortunately it does not include stroke.
    Maybe stick a copy in the resources section Mr Grey @GreyImport

    I added a 2005 Ohlins catalogue to the resources section. Might be useful for those wanting to find matching shocks. You can also go Ohlins online and even though the item might be discontinued it still links to a detail page that gives length & stroke.
     
    • Like Like x 3
    • Winner Winner x 1
    Last edited: Sep 1, 2018
    maelstrom, Aug 20, 2018
    #1
  2. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,292
    Likes Received:
    2,508
    Trophy Points:
    918
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Albury 2641
    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    Wow.. there is some really good info in there.. I wonder who sells YSS here in Aus.
     
    • Agree Agree x 1
    Andych, Aug 20, 2018
    #2
  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    • Like Like x 2
    maelstrom, Aug 20, 2018
    #3
  4. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,292
    Likes Received:
    2,508
    Trophy Points:
    918
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Albury 2641
    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    The FZR250 3LN1 shock I will be using on the SRX250 is currently still apart so I will measure it up in the next few days..
     
    • Like Like x 1
    Andych, Aug 21, 2018
    #4
  5. ShaneP

    ShaneP Well-Known Member

    Messages:
    2,574
    Likes Received:
    1,101
    Trophy Points:
    798
    Joined:
    May 12, 2014
    Gender:
    Male
    Location:
    Yeppoon
    My Bike:
    Yamaha FZR250 speed bike, Yamaha YZ/WR250F, Kawasaki ZX2R, Honda VTR250, DR350 (x 3.5), a couple of prototypes and whatever else.
    EBay. I've seen them on there, though I think it was out of Germany.
     
    ShaneP, Aug 21, 2018
    #5
  6. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    If you really want a YSS shock let me know and I will get a price.
     
    • Like Like x 1
    • Informative Informative x 1
    maelstrom, Aug 21, 2018
    #6
  7. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,292
    Likes Received:
    2,508
    Trophy Points:
    918
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Albury 2641
    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    I will keep that in mind @maelstrom :)

    Just for fun I had a look at that Spring rate calculator.. that is quite a handy little tool.
    Especially if you are changing shocks from say FZR250 to the R6R shock.
    You can at least look at the spring to see how they compare on Spring Rate.
    It could help take some of the guesswork out of the swap.
    As @my67xr found out by trial and error the fulcrum ratio on a monoshock can not only raise or lower the ride height but also affects how stiff the suspension is on the spring alone, which affects Sag and overall handling.
    Using this tool and knowing the details of the spring on the new shock you can calculate what changes need to be made to the doglegs to keep the overall spring rates similar.. unless you are an FB like me and you need much higher rates to stop the rear bottoming out :)
    I will get out to the garage later on today / tonight to measure up the spring and the shock.
     
    • Like Like x 1
    Last edited: Aug 21, 2018
    Andych, Aug 21, 2018
    #7
  8. TonyZXR

    TonyZXR Well-Known Member

    Messages:
    447
    Likes Received:
    260
    Trophy Points:
    273
    Joined:
    Apr 17, 2018
    Gender:
    Male
    Location:
    New South Wales
    My Bike:
    GPX250, ZXR250A, ZXR250C
    I've got an old zxr250 shock I can measure up
     
    TonyZXR, Aug 21, 2018
    #8
  9. ShaneP

    ShaneP Well-Known Member

    Messages:
    2,574
    Likes Received:
    1,101
    Trophy Points:
    798
    Joined:
    May 12, 2014
    Gender:
    Male
    Location:
    Yeppoon
    My Bike:
    Yamaha FZR250 speed bike, Yamaha YZ/WR250F, Kawasaki ZX2R, Honda VTR250, DR350 (x 3.5), a couple of prototypes and whatever else.
    Not sure if anyone wants to try upgrading, saw these:
    Screenshot_20180821-164623.png
    Screenshot_20180821-171925.png
     
    ShaneP, Aug 21, 2018
    #9
  10. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,292
    Likes Received:
    2,508
    Trophy Points:
    918
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Albury 2641
    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    The Yammy needs to have a clevis on the bottom.. the R6R is the proven shock to use on an FZR250 at least.
     
    Andych, Aug 21, 2018
    #10
  11. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    YSS just gave me a price of 9100 THB for the MC22 shock which is the same price I paid for the Ohlins to suit the new CBR250's. I might look into getting an Ohlins and modding it like I did for my R4.
     
    maelstrom, Aug 21, 2018
    #11
  12. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,313
    Likes Received:
    2,383
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    Here's some measurement's for the FZR250R 3LN series rear shock ( taken off my 3LN3 )
    I haven't had the spring off to measure the free length, but compressed/fitted length is 174mm
    And the spring o/d was taken when fitted
    Number of coil's is approx 6.111

    20180901_094904.jpg 20180901_100956.jpg
     
    • Nice Work Nice Work x 1
    Last edited: Sep 1, 2018
    my67xr, Sep 1, 2018
    #12
  13. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Thanks, I added the info and I will make a link to the image also.
     
    maelstrom, Sep 1, 2018
    #13
  14. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

    Messages:
    6,400
    Likes Received:
    4,788
    Trophy Points:
    1,148
    Joined:
    May 4, 2013
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Tamworth, NSW
    My Bike:
    1937 Royal Enfield 250, CF Moto 250 V5, Honda's XL250, CBR250, FT500 plus a few others.
    What happened to the rubber bump stop?
     
    Murdo, Sep 1, 2018
    #14
  15. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,292
    Likes Received:
    2,508
    Trophy Points:
    918
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Albury 2641
    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    UNADJUSTEDNONRAW_thumb_1227.jpg No rubber bump stop on mine either.. the only other dimensions are the free length of the spring 185mm and the OD of the spring is 80mm (maybe I should re-measure it as I dont think I have 5mm of paint on the spring) so the spring rate can be calculated... I was trying to find where I wrote all the dimensions down.. lol.
     
    Last edited: Sep 1, 2018
    Andych, Sep 1, 2018
    #15
  16. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Is yours a 3LN1 or 3 also? The 3LN5&6 have a different part number but that might just be the colour.
     
    maelstrom, Sep 1, 2018
    #16
  17. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

    Messages:
    4,313
    Likes Received:
    2,383
    Trophy Points:
    898
    Joined:
    Jun 18, 2016
    Gender:
    Male
    Occupation:
    Panel Beater, Spray Painter, Custom Fabricator
    Location:
    Adelaide, South Australia
    My Bike:
    Yamaha's , 1990 FZR250R 3LN3 , 1986 XT250TS 57R , 1984 IT200L 43G, 1976 IT400C 510
    Mine doesn't have a bump stop, neither do any of the image's i found online of FZR250R rear shock's,
    there's not a part number for one either that i could find in the Part's Catalogue


    @maelstrom you might want to add 'Active' to the number of coil's in your chart to avoid any confusion
     
    • Agree Agree x 1
    Last edited: Sep 1, 2018
    my67xr, Sep 1, 2018
    #17
  18. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Done. The diameter of the spring makes a lot of difference to the rate calculator so we will have to wait for @Andych to confirm that or someone else.
     
    maelstrom, Sep 1, 2018
    #18
  19. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,292
    Likes Received:
    2,508
    Trophy Points:
    918
    Joined:
    Oct 6, 2016
    Gender:
    Male
    Location:
    Albury 2641
    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    Ok.. Craig was correct, outside diameter of the spring is 75mm and wire diameter is 10mm
     
    • Like Like x 1
    Andych, Sep 1, 2018
    #19
  20. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    So with Craig's numbers the 250 shock spring is 9.2 kg/mm or thereabouts.
     
    maelstrom, Sep 1, 2018
    #20
Page 1 of 2

Share This Page