Beta fork seals

Discussion in 'Trials' started by gottadog, Apr 7, 2020.

  1. gottadog

    gottadog Adventurer

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    I bought an 18 Evo Factory 300 last year. It needs fork seals bad. In the past I've found info on what skf seals I could use from say an older Honda street bike. Is this something anyone still does? I can't believe how expensive the parts are. I was priced $138 for the seals and bushings. Not including dust seals.

    I've had a hard time finding info on the seals. Trials sites suggest two different seals for these bikes and I'm not sure which one. Would like to narrow it down and hopefully source my own parts. Beta aftermarket hasn't been easy to figure out.

    Appreciate your help.
    #1
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  2. Huzband

    Huzband Team Dirt

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    #2
  3. neilking

    neilking Been here awhile

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    Get the green seals/dust cover from beta. $70 for a full set. You shouldn't need bushings,so that's a waste of money.
    #3
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  4. lineaway

    lineaway Long timer

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    First off, is both sides leaking? And the green ones are the way to go. The 18's are a different fork and they only list quantity, so make sure you drain it good. Both of the 18s I have done had a scratched fork tube.
    #4
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  5. Junglejeff1

    Junglejeff1 Long timer

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    I sourced seals for my old Paoli forks from race tech.If you go to there parts you most likly will find seals at least.They also have many, many bushings to cross reference.I replace many bearings,seals,Fork parts with better parts than stock at cheaper prices.Stock tech fork bushing and seals are just stupid priced and I see racetech has might have them at a fraction of the cost.
    #5
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  6. motobene

    motobene Motoing for 49 years Supporter

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    Measure your seals. Outside diameter X inside diameter X height. Seals usually measure close to millimeter nominals though the B dimensions are going to be a little oversize for a press fit into bores. A dimension is the fork stanchion rod and will be right on a millimeter nominal. The C dimension is sometimes on the half mm or off nominal.

    This might help you get closer in selecting a seal:
    SKF 1.JPG
    SKF 2.JPG
    SKF 3.JPG
    #6
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  7. gottadog

    gottadog Adventurer

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    Guys thanks for the reply's. Good info, but I'm not feeling enough accuracy measuring used seals.

    If its one thing I dislike about Beta its their control on parts. I'm used to the availability of OEM and aftermarket parts for my big bike.
    #7
  8. volrider

    volrider Been here awhile

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    I’d contact Ray Peters. I’m sure he’d be willing and able to get you fixed up.
    #8
  9. lineaway

    lineaway Long timer

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    #9
  10. gottadog

    gottadog Adventurer

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    Bike: Beta Rev/Evo 01-17

    Maybe it'll take me 10 seconds. I've been told the 18' Factory is different.
    #10
  11. lineaway

    lineaway Long timer

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    Quick check would be diameter. As long as its 38 your good.
    #11
  12. lineaway

    lineaway Long timer

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    Same as it's ever been. Just checked Beta parts.
    #12
  13. motobene

    motobene Motoing for 49 years Supporter

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    #13
  14. gottadog

    gottadog Adventurer

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    Thank you guys. Trials info is definitely more challenging than the big bikes.
    #14
  15. motobene

    motobene Motoing for 49 years Supporter

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    It is. That's why it's only for the few who are willing to take an ass kicking to get to the benefits. Trials is no easy sell, but it is worth it.
    #15
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  16. gottadog

    gottadog Adventurer

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    Me again. Where do you guys find Beta fork capacities? I'm not familiar with these forks. Is the oil by volume or level? I went on Beta USA. The service manual is motor only and the owners manual link doesn't work. 404 error.

    Thanks for the help. I definitely want to do my own fishing so if you guys have links or any info that would help with future searches I'd appreciate it all.
    #16
  17. lineaway

    lineaway Long timer

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  18. gottadog

    gottadog Adventurer

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    I believe I've translated the correct info. 297 g oil.

    While screwing around translating I saw a forum and the guy suggested ATF instead of fork oil. What are you running in your forks?
    #18
  19. lineaway

    lineaway Long timer

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    Maximal 5wt.
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  20. Cascao

    Cascao Been here awhile

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    ATF (around 7W) is used on small motorcycles and should be ok.
    Life is expected to be shorter than syntetic ones.
    #20