Announcement

Collapse
No announcement yet.

Fork oil quantity

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Fork oil quantity

    Getting ready to do a full fork rebuild and spring replacement. Gonna buy 10wt Belray oil and just looked at quantity and showing near 17oz of oil per fork. Is this correct? This will be my first time doing forks on the Roadstar. Just want to ensure I got at least 2 quarts of oil before I start. JC

  • #2
    Clean forks thoroughly (remove from bike)... I use brake cleaner first to get nastiest shit out. Then fill each fork halfway Auth ATF and cap it (all internal parts removed and can clean those with brake cleaner) and shake back and forth a ton on each fork.... Then let drain... Then quick rinse with brake cleaner.... Then they should be clean and dry.... May want to look at plastic bushing and all seals... Cheap to buy and not a hard job....

    You can measure fork oil from top... I think mine were to be 110mm or something like that. . I did that instead of measuring oz.
    LET'S RIDE

    Comment


    • #3
      Saved from a post.

      Comment


      • #4
        Yeah I saw in the manual when fork tube fully lowered without spring 110mm to top. Quantity was a bit over 16.x oz or so. I have a leftover jug of Belray (20oz or so) from the last rebuild of my XS 650. Just want to confirm that close to 2 quarts of fork oil is required. And yes I am doing a full rebuild with all seals and bushings.

        Comment


        • Brad_G
          Brad_G commented
          Editing a comment
          16oz is a pint (32oz = quart) so if you have some leftover from your other rebuild you'd only need a quart.

      • #5
        It’s a tad over a quart to do 110mm from the top.


        Wherever you go in life, ride there if at all possible.

        Comment


        • #6
          Right on guys thanks!

          Comment


          • #7
            jd750ace can I ask a question (and it may sound dumb because I've never been inside forks)? I'm curious why it takes over 2 quarts. According to the service manual:

            Quantity
            554.0 cm
            3 (18.73 US oz) (19.54 Imp.oz)
            Recommended oil Yamaha fork oil 5WT

            So if a quart is 32oz, that's roughly 13oz more than the manual states. Is there a difference in the internal springs and parts you're using where it requires more oil to fill the volume of the stock parts that are exchanged? The manual mentions the 110mm height as well. Just trying to wrap my head around why there are differences here.

            Thanks for enlightening the uninformed.



            Last edited by Brad_G; 01-20-2021, 10:48 AM. Reason: fix typo

            Comment


            • #8
              His number is for both forks at 110mm. Your quantity noted from the manual is each fork leg.

              Comment


              • Brad_G
                Brad_G commented
                Editing a comment
                Yeah I figured the manual was giving a per fork measure. But above he mentions just over 2 quarts which would be 64+oz.

                One quart is almost 40% more per shock than the 18.73oz stated in the manual. Watching his video I know he's not spilling it all over the floor while he's working. So I'm just trying to understand why as I'll eventually need to go in there.

            • #9
              I said it wrong. You’ll need 2 quarts on hand because it takes a little over one quart to hit the mark on both tubes. There is nothing in the tubes when you set up the oil height, so the displacement from the springs and spacers doesn’t come into play.


              Wherever you go in life, ride there if at all possible.

              Comment


              • Brad_G
                Brad_G commented
                Editing a comment
                Thanks for the clarification JD. I wasn't trying to be an ass but was confused. That makes total sense and jives with what the service manual states. I just wasn't sure if this were another case of where the service manual may have had a misprint.

            • #10
              No worries. Good catch. People have been known to put about half the required quantity in each tube, then put 4 ounces of HD30 oil in the bottle and shake it up to make up the small amount more required. I feel like this the same as I do about trying to blend 5 and 10 weight in a cup to make 7.5. That’s not exactly how it works, but I also understand how it feels to use 2 ounces out of a 12 dollar bottle of fork oil .
              I don’t worry about it Because I have 2 sets of forks that use the same oil.


              Wherever you go in life, ride there if at all possible.

              Comment

              Latest Posts

              Collapse

              Topics Statistics Last Post
              Started by LDofDC, 12-23-2020, 12:17 PM
              127 responses
              684 views
              0 likes
              Last Post roadiemort  
              Started by whale2455, 17 hours ago
              3 responses
              77 views
              0 likes
              Last Post Tykes_Place  
              Started by Jaybo, 6 days ago
              34 responses
              283 views
              2 likes
              Last Post Shores
              by Shores
               
              Started by roadiemort, 4 hours ago
              2 responses
              42 views
              1 like
              Last Post Tropicalrs  
              Started by JayPee, 16 hours ago
              5 responses
              51 views
              0 likes
              Last Post roadiemort  
              Started by Jinro, 1 day ago
              7 responses
              112 views
              2 likes
              Last Post Jinro
              by Jinro
               
              Started by $arleysSuck, 20 hours ago
              9 responses
              67 views
              0 likes
              Last Post Horsehammerr  
              Started by AZRoadie, 2 days ago
              14 responses
              109 views
              0 likes
              Last Post Shores
              by Shores
               
              Started by Madmichaeld, 19 hours ago
              7 responses
              45 views
              0 likes
              Last Post Father Pobasturd  
              Started by Doc_V, 09-23-2020, 02:48 AM
              92 responses
              1,595 views
              1 like
              Last Post davej
              by davej
               
              Started by NthernLgts, 4 days ago
              11 responses
              180 views
              0 likes
              Last Post NthernLgts  
              Started by roadiemort, 6 days ago
              8 responses
              115 views
              0 likes
              Last Post roadiemort  
              Started by Madmichaeld, 19 hours ago
              1 response
              40 views
              0 likes
              Last Post Father Pobasturd  
              Started by Peterboro Pete, 2 days ago
              11 responses
              66 views
              0 likes
              Last Post Chromepony  
              Started by AZRoadie, 2 days ago
              4 responses
              107 views
              0 likes
              Last Post Chromepony  
              Started by AZRoadie, 1 week ago
              12 responses
              258 views
              0 likes
              Last Post AZRoadie  
              Started by Shores, 1 day ago
              2 responses
              37 views
              0 likes
              Last Post moose
              by moose
               
              Started by Jinro, 12-08-2020, 06:02 AM
              19 responses
              511 views
              10 likes
              Last Post Ironman
              by Ironman
               
              Started by MikeyC, 1 week ago
              13 responses
              112 views
              0 likes
              Last Post MikeyC
              by MikeyC
               
              Started by BrokenWheel, 1 day ago
              8 responses
              61 views
              0 likes
              Last Post BrokenWheel  
              Working...
              X