Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 31

Thread: Fork Oil Questions

  1. #21
    Site Supporter T_C's Avatar
    Bike
    2005 St1300
    Join Date
    Mar 2012
    Location
    St. Louis, MO
    Posts
    4,363
    Tip Overs
    1
    My Gallery

    Re: Fork Oil Questions

    Quote Originally Posted by MajorTom View Post
    I'm trying out the Bel Ray 7 wt. in my next fork oil change. Also will be switching to flat rate springs as a suspension upgrade, so I won't be able to compare the SS-8 that's in there now with the Bel Ray 7 wt.
    When I dropped in Sponic Springs the 7wt was what was recommended by them. Works good so far and if I want to go a little lighter or heavier I can do that with the Belray easy enough. No mixing SS7/SS-8. Just buy the weight I want.
    1 drop in reverse, so is that a minus 1? 205/50-17 Goodyear TripleTred, 130/70-18 Bridgestone BT-45 (rear)
    While you're alive, shine: never let your mood decline. We've a brief span of life to spend: Time necessitates an end.

  2. #22
    Be Thou My Vision dduelin's Avatar
    Join Date
    Feb 2006
    Location
    Jacksonville
    Posts
    7,268
    Tip Overs
    08
    2017 Miles
    015625

    My Gallery
    Quote Originally Posted by MajorTom View Post
    I don't see how that works given there's a limited space the spring occupies within the fork. If the spacer takes up more space there's less space for the spring. Doesn't adding preload close the distance between the coils in the spring? Take this to the extreme and the spring is totally compressed by the spacer and the fork travel is zero. In our real world with a fork spring that's close to the right rate for the application, preload would have little effect on the distance between the coils, but even adding a small amount of preload should reduce the space between the coils and therefore the distance the fork can compress.
    Consult any suspension tuning guide and take it a piece at a time. Additional preload does not reduce travel if the spring rate is within the range acceptable for rider weight. Try this image: yes, adding to stock preload compresses the coils more but the top of the spring is now pressing up against the bottom of the fork cap which is now that much further from the end of the spring so the top of the fork is further from the ground. All that changed is ride height.

    Whether you understand my attempts to explain it's true and if you choose the 1.0 and have too little sag you'll have to reduce preload to hit target sag. Within limits it's easier to add preload than shortening the spring.

  3. #23
    QuickBlue MajorTom's Avatar
    Bike
    '04 ST1300
    Join Date
    Apr 2010
    Location
    Devon, Alberta
    Posts
    632
    Tip Overs
    4
    My Gallery

    Re: Fork Oil Questions

    I don't really think dwalby, you and I are really disagreeing here, just talking about different cases, i.e. real-world application in your case versus theoretical, but not realistic limitations on my part. Thanks to both of you for your patience and careful explanations.

    Anyway it's now irrelevant to my situation as I've managed to track down and order the 0.95 kg/mm Race Tech springs on the fortnine.ca website. As I have the Bel Ray 7 wt. oil on hand I'll start with that.
    Barry


    Keeping the blue side up.

  4. #24
    rogo's Avatar
    Bike
    '05 ST1300
    Join Date
    May 2011
    Location
    Duluth GA
    Posts
    43
    Tip Overs
    1
    My Gallery

    Re: Fork Oil Questions

    Tried to procure fork oil today at cycle gear. Alas no 8 weight. They had 7 and 10. I like my suspension and don't want any surprises with handling. Any recommendations? The Honda shop where I got my bike is no longer in business. I miss my old parts counter.

  5. #25
    Site Supporter T_C's Avatar
    Bike
    2005 St1300
    Join Date
    Mar 2012
    Location
    St. Louis, MO
    Posts
    4,363
    Tip Overs
    1
    My Gallery

    Re: Fork Oil Questions

    Quote Originally Posted by rogo View Post
    Tried to procure fork oil today at cycle gear. Alas no 8 weight. They had 7 and 10. I like my suspension and don't want any surprises with handling. Any recommendations? The Honda shop where I got my bike is no longer in business. I miss my old parts counter.
    If you are looking for 8wt because you saw Hons a oil is SS-8, it isn't.

    I'm using 7wt (Bel-Ray) but I also dropped in stiffer springs.

    PS if you really want 8wt, buy the 7 and 10 and mix. You'll have 8.5 with mixing 1:1.
    Last edited by T_C; 09-17-2017 at 10:51 AM.

  6. #26
    rogo's Avatar
    Bike
    '05 ST1300
    Join Date
    May 2011
    Location
    Duluth GA
    Posts
    43
    Tip Overs
    1
    My Gallery

    Re: Fork Oil Questions

    Quote Originally Posted by T_C View Post
    If you are looking for 8wt because you saw Hons a oil is SS-8, it isn't.

    I'm using 7wt (Bel-Ray) but I also dropped in stiffer springs.
    PS if you really want 8wt, buy the 7 and 10 and mix. You'll have 8.5 with mixing 1:1.
    What is Honda SS-8? That is the only spec' I can find in the OEM service manual. Counter guy at formentioned "parts" counter couldn't help. I am staying with the factory setup.

  7. #27
    rogo's Avatar
    Bike
    '05 ST1300
    Join Date
    May 2011
    Location
    Duluth GA
    Posts
    43
    Tip Overs
    1
    My Gallery

    Re: Fork Oil Questions

    [QUOTE=rogo;2038979]What is Honda SS-8? That is the only spec' I can find in the OEM service manual. Counter guy at formentioned "parts" counter couldn't help. I am staying with the factory setup.[/I was going to order on line and found it to be 10w. Going to pick up Delray 10w

  8. #28
    L Plate Rider TerryS's Avatar
    Bike
    1990 ST1100
    Join Date
    Mar 2016
    Location
    Auckland, New Zealand
    Posts
    380
    My Gallery

    Re: Fork Oil Questions

    SS-8 is broadly equivalent to 10W oil. The reference I have states a viscosity of 39.7 cSt at 40C which is at the upper end of a typical 10W oil.

  9. #29
    VFRedrider's Avatar
    Bike
    05 St1300
    Join Date
    Sep 2007
    Location
    Sunnyvale, Ca.
    Posts
    11
    2017 Miles
    008500

    My Gallery

    Re: Fork Oil Questions

    Tom,
    I'm tipping the scale at 230 these days, geared up prolly north of 245. I think Sonic is over springing the deal a good bit. $.02
    ...jus' keepin' the shiny bits up and the rubbery bits down

  10. #30

    Re: Fork Oil Questions

    I tried the 2.1 sonic with 7 wt oil and found it way too harsh. I switch them out for the sonic 1.1 springs, 140 mm spacer, one washer, and 7 wt oil at 125 mm from the top. Perfect for my weight and riding style.

+ New Posts
Page 3 of 4 FirstFirst 1234 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •