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  1. #1

    Cam bucket/lifter wear

    Just the facts behind this.
    These cam lifters/buckets came out of a pure racing engine that had very few hours on it, and had constantly been run in the 8700-9000 rpm range.
    R&D R2 cams and R&D dual valvesprings setup according to specs by me.
    Cam lobes were fine and miked out perfect, so obviously the buckets are not as hard as the cam lobes.
    Yamalube oem oil was used in this engine.

    My engine used the exact same setup with the R1 cams instead from R&D, so no basic difference there.
    After approx 8-10 hours on my engine the buckets/lifters cams look perfect.
    I use royal purple synthetic oil with a splash of stp added as a friction modifier.

    The big arguement around which oil to use always seems centered on the sprag and its operation.
    I have never had any oil related problem with my supercharger sprag, or starter sprag, and neither has at least 4 others locally who have used synthetic oil exclusively for 2 years now.

    The real reason to use the best friction modifiers available today is in the photos.
    Cams that are friction by operation and not roller always seem to suffer the brunt of the wear when spring pressures, valve lift, and rpms are increased for racing.
    I realize everyone has their own opinions on which oil is best, and im not here to start a big arguement over that, but i just wanted to post my findings, and the facts behind them, so everyone can see and draw their own conclusions.
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  2. #2
    800AMSOIL4U's Avatar
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    What yamalube and royal purple was being used? Ie. Motorcycle, pwc oil? What weight also?

  3. #3
    Lightning Struck's Avatar
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    ZDDP has a large role in cam/lifter wear.. It's tough finding oil with any appreciable amount of it anymore...

  4. #4
    abracadabra's Avatar
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    The techs at Riva's R&D department found this issue a year ago when they took my engine apart and have developed a new bucket kit that is resistant to the stress associated with running the motor at higher RPMS and it is available now. I'm running them in my new FZS motor, Julio

  5. #5
    Royal purple example here. I use the 10-30.
    Royal Purple Motor Oil

    Yamalube example here..
    YAMALUBE 10W-40 ALL PURPOSE OIL - 1 QUART | MotoSport

  6. #6

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    Ross the yamalube you have in your link is for Motorcycles/atv ect. is is NOT the same as Yamalube 4w which is the PWC 4 stroke oil oil here is the link for info on that PWC oil Yamaha Motor Corporation, USA - Yamalube® Oil Yamalube® 4W Tommy Jordan

  7. #7
    abracadabra's Avatar
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    Which oil do you use Tommy? Thanks, Julio...

  8. #8

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    Quote Originally Posted by abracadabra View Post
    Which oil do you use Tommy? Thanks, Julio...
    I use Yamalube 4w (marine PwC oil) and oem Yamaha oil filters. Tommy Jordan

  9. #9

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    Quote Originally Posted by Lightning Struck View Post
    ZDDP has a large role in cam/lifter wear.. It's tough finding oil with any appreciable amount of it anymore...
    +1
    I read the E.P.A. has something to do with trying to get rid of "Zink" (zink dialkyldithiophosphate) or ZZDP as you call it.
    Brad Penn oil fits the bill (increased concentration of Zink)
    Welcome!
    http://penngrade1.com/Zinc.aspx

  10. #10
    Lightning Struck's Avatar
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    Rotella has it too.. Damn good oil

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