Fork oil

Discussion in 'Whizzer Motorized Bicycles' started by peter nap, May 6, 2008.

  1. peter nap

    peter nap Member

    I have an 07 NES, with 500 miles on it. I see some light spraying on the triple tree coming from the front fork tubes. The tubes don't seem to have enough compression and bottom out once in a while.

    How much oil is supposed to be in it and what kind?


  2. RdKryton

    RdKryton Active Member

    My service manual has that info but it is at my brothers house. Hopefully Bill Green or Quenton or MotorbikeMike can chime in with your answer.

  3. bill green

    bill green Member

    Hi Sorry I cant find that amount and fluid weight any where hopefuly Quenton has it.If you dont hear from him tonight .call dave at whizzer tomarrow 1877-944-9937 Hope this helps Bill Green PS please post results
  4. smitty

    smitty Guest

    Hi all-
    My manual says four ounces in each fork leg, and Quenton told me to use hydraulic jack oil.(available at most auto parts stores.)
  5. peter nap

    peter nap Member

    Hmmmm....I just spoke to Dave and he said hydraulic jack oil, 10W (seems light) and 3 oz max.
    He suggested starting at 2 and depending on my weight and the terrain, going up from there.

    Since I'm getting old and fat, I thought I'd start at 2.5 and go until it was right. Dave did say that at 3 oz, there was almost no give at all.. It could be Dave is talking about maximum useful capacity and 4 oz is maximum capacity.
  6. bill green

    bill green Member

    hi guys the word I got was 15 wt fork oil ,start at 3oz to 4oz depending on load .......Bill Green
  7. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    Hi Guys,
    I use 4 0z and I weigh 165 to 170.

    Have fun, Quenton
  8. MoonKS

    MoonKS Member

    So where do you add the oil? Mine is leaking a bit as well.


  9. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    I just completed a rebuild on my 1999 front forks. I installed 4 seals, 2 inner, and 2 outer [dust cover type], and put in 4 oz. of hydrauic jack oil, and my forks work better than they ever did. I removed the forks, turned upside down and drained all the oil from the tubes, before I replaced the seals. One tube had more oil than the other, most likely because only one of the seals leaked.
    I think there are 2 different front forks [3 counting the Ambassador], and the 1999 is [are?] slightly different from the later versions, I know they use different seals.

    You must remove the 2 large nuts [bolts] at the top of each tube to install fluid.

    Have fun,
  10. peter nap

    peter nap Member

    I can't find any weights on jack oil. It just sqys "Jack Oil". Went to NAPA and the same thing. The Jack oil is pretty thin. What's the difference between Hydraulic oil and Jack oil?
  11. KiDD

    KiDD Member

    One is for jacks... the other isn't...
  12. peter nap

    peter nap Member

    Great answer! Why didn't I think of that?
  13. peter nap

    peter nap Member answer my own question, it's the anti foaming additives in hydraulic oil. They can cause seal failure in a jack and I assume fork tubes.

    Standard weight motor oil will work fine in a jack or tubes though. I just need to find some 15w oil now.
  14. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    I Used the NAPA brand [jack oil]

  15. bill green

    bill green Member

    Hi guys just tested jack oil and fork oil ,The closest weight to fork oil is 10wt , so any 10 weight motorcycle fork oil should work great .... Bill Green (used paint meter and watch)