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Ripper Racing rnd 4 560am

  1. 07-28-11, 02:05 PM #26
    Mr. Kurtz
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    Re: Ripper Racing rnd 4 560am

    Bummer about the motor Chip, hopefully it's something you can fix and finish the season.

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  2. 08-02-11, 12:39 PM #27
    Chippertheripper
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    Re: Ripper Racing rnd 4 560am

    Spun right side main bearing. 25% loss of the edge of the rollers, took the piston too. 9.5 hrs on the rebuild. Cliffs is coming through bigtime on this, saying it should've lasted longer, so I'm currently exploring converting the right side to a ball bearing, just like the left in those motors.

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  3. 08-02-11, 12:45 PM #28
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    Re: Ripper Racing rnd 4 560am

    I'd say go to preloaded angular contact bearings with the oil delivery mod as discussed over at Thumpertalk. So far it seems to have 'cured' the bearing issue when motarding RFS motors.

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  4. 08-02-11, 01:35 PM #29
    Chippertheripper
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    Re: Ripper Racing rnd 4 560am

    You got a link Josh? My google fingers are getting tired...

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  5. 08-02-11, 02:06 PM #30
    Kurlon
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    Re: Ripper Racing rnd 4 560am

    http://ktmtalk.com/index.php?showtopic=383914&st=0 Long read but covers the evolution of the final solution.

    http://ktmtalk.com/index.php?showtopic=427210 Short and sweet.

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  6. 08-02-11, 06:18 PM #31
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    Re: Ripper Racing rnd 4 560am

    get a real bike

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  7. 08-02-11, 06:33 PM #32
    csmutty
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    Re: Ripper Racing rnd 4 560am

    Get a crf.

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  8. 08-02-11, 08:13 PM #33
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    Re: Ripper Racing rnd 4 560am

    So I can shoot the crank through the bottom of the motor?

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  9. 08-02-11, 08:28 PM #34
    csmutty
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by Chippertheripper View Post
    So I can shoot the crank through the bottom of the motor?
    At least that motor lasted more than 9 hours.

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  10. 08-02-11, 08:43 PM #35
    Chippertheripper
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    Re: Ripper Racing rnd 4 560am

    No it didn't...

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  11. 08-02-11, 08:46 PM #36
    csmutty
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by Chippertheripper View Post
    No it didn't...
    It lasted longer than yours ok.

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  12. 08-03-11, 12:01 PM #37
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    Re: Ripper Racing rnd 4 560am

    So can you run an Hour meter on that and what kind of life do those usually get....out of the motor...

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  13. 08-03-11, 05:14 PM #38
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by csmutty View Post
    It lasted longer than yours ok.
    That motor didn't even last an hour. And weren't you having all kinds of trouble with your CRF this season too?

    If that fix takes care of the crank issues, you've got yourself a very reliable 60+ hp bike there, Chipper. Good luck with it.

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  14. 08-03-11, 05:15 PM #39
    csmutty
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by lrrs313 View Post
    That motor didn't even last an hour. And weren't you having all kinds of trouble with your CRF this season too?

    If that fix takes care of the crank issues, you've got yourself a very reliable 60+ hp bike there, Chipper. Good luck with it.
    The head just needed to be rebuilt on mine. Now she runs like a kitten. And he had more than an hour on the crank...which is all that matters. Haha.

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  15. 08-03-11, 05:20 PM #40
    lrrs313
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by csmutty View Post
    The head just needed to be rebuilt on mine. Now she runs like a kitten. And he had more than an hour on the crank...which is all that matters. Haha.
    I had 2.5 seasons on my 560 before it ate a crank bearing. 4 full seasons on the original valvetrain, and the bike is still out there racing (I don't know if he has rebuilt the head yet or not). Show me a 60+ hp CRF that lasts even CLOSE to that long.

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  16. 08-03-11, 05:22 PM #41
    csmutty
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by lrrs313 View Post
    I had 2.5 seasons on my 560 before it ate a crank bearing. 4 full seasons on the original valvetrain, and the bike is still out there racing (I don't know if he has rebuilt the head yet or not). Show me a 60+ hp CRF that lasts even CLOSE to that long.
    A CRF doesn't need 60 hp to keep up with a pig like that lol.

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  17. 08-03-11, 05:29 PM #42
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    Re: Ripper Racing rnd 4 560am

    Quote Originally Posted by csmutty View Post
    A CRF doesn't need 60 hp to keep up with a pig like that lol.
    Never rode one, did you? Ask Clark how my KTM handled. And ask Martire how much work he had to put into that KXF to come close to the lap times he did on a stock SMR.

    I won't argue parts availability and cost, but I really don't understand why everyone seems to think KTMs have reliability problems. I've never seen one break a con rod.

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  18. 08-03-11, 05:49 PM #43
    Chippertheripper
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    Re: Ripper Racing rnd 4 560am

    That's next!

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  19. 08-03-11, 08:09 PM #44
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    Re: Ripper Racing rnd 4 560am

    My 01 520SX went some obscene number of hours with a busted rocker and only 3 working valves. Damn thing still podiumed the Am class starting in the Novice wave.

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