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Thread: Oil pump pressure spring

  1. #1
    apriliaforum prov-nov Honzajz's Avatar
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    Oil pump pressure spring

    Correcting the oil pump which was damaged piston oil pressure regulator. I found that the old spring is 43 mm long. In the service manual it says that the minimum length of the spring is 56 mm ....

    I ordered a new spring came and 43 mm long. someone repaired the oil pump and you know how to be a long spring ?? thanks
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  2. #2
    apriliaforum expert deefred's Avatar
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    Which partnumber did you get?

    From another thread:
    98-00 Use both of this ones

    AP0239447
    AP0239440

    01-03 Uses AP0239447
    So know we got tree diffrent springs!

    Hmmm no that is wrong WE got Four diffrent!

    RSV-SP 2000

    AP0239445

    RSV 04-> + Falcon

    AP0239449
    2001 RST Futura in stream Silver.
    Mods: Modified Öhlins fork from mille R, EBC brake discs, HEL front brakelines, Carbon RS 250 front fender, Wiring mod for charging. Engine related:05 map, Iridium plugs, tuneboy, derestriced intake, old mille airboot, staintunes exhaust. Lambda bung hardbrazed in the "breadbox". Öhlins mille R rear shock with 110N/mm spring and the integrated hydraulic preload adjuster. LED Voltmeter installed inside the dash for monitoring charging. Duc 999 radial m/c for brake and clutch. EBC 320mm brake discs
    NWS hugger. Equipment: Famsa tankbag,
    CBR 600 -07 MOSFET R&R FH008EE providing stable 14.4 - 14.5 V (with my wiring mod). Daytona heated grips with mccoi pwm controller and automatic chain oiler

  3. #3
    apriliaforum prov-nov Honzajz's Avatar
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    I ordered the spring for FUTURE AP0239447

    I crawled through all the manuals for Rotax engine and everywhere min length 56 mm ...: - /
    Last edited by Honzajz; 08-07-2014 at 03:43 AM.

  4. #4
    apriliaforum expert deefred's Avatar
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    The mille 2004 and newer forum is discussing pump springs as they think their oil pressure should be higher.
    Ask in there if they have more info.
    2001 RST Futura in stream Silver.
    Mods: Modified Öhlins fork from mille R, EBC brake discs, HEL front brakelines, Carbon RS 250 front fender, Wiring mod for charging. Engine related:05 map, Iridium plugs, tuneboy, derestriced intake, old mille airboot, staintunes exhaust. Lambda bung hardbrazed in the "breadbox". Öhlins mille R rear shock with 110N/mm spring and the integrated hydraulic preload adjuster. LED Voltmeter installed inside the dash for monitoring charging. Duc 999 radial m/c for brake and clutch. EBC 320mm brake discs
    NWS hugger. Equipment: Famsa tankbag,
    CBR 600 -07 MOSFET R&R FH008EE providing stable 14.4 - 14.5 V (with my wiring mod). Daytona heated grips with mccoi pwm controller and automatic chain oiler

  5. #5
    apriliaforum expert RAS's Avatar
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    Quote Originally Posted by deefred View Post
    The mille 2004 and newer forum is discussing pump springs as they think their oil pressure should be higher.
    Ask in there if they have more info.
    Higher than what they see on a gauge? Or higher than what should be spec?

    I seem to remember Micah or someone not too long ago when someone had a pump gear failure saying that there were spring length changes.

    I can see that piston wearing with time - it would me smooth and shiny, just smaller in diameter. But how does it get cut like someone put a pair of vice grips on it?

  6. #6
    apriliaforum expert deefred's Avatar
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    Second gen mille use a lower oil pressure and them seem to have more rod bearing failures.
    2001 RST Futura in stream Silver.
    Mods: Modified Öhlins fork from mille R, EBC brake discs, HEL front brakelines, Carbon RS 250 front fender, Wiring mod for charging. Engine related:05 map, Iridium plugs, tuneboy, derestriced intake, old mille airboot, staintunes exhaust. Lambda bung hardbrazed in the "breadbox". Öhlins mille R rear shock with 110N/mm spring and the integrated hydraulic preload adjuster. LED Voltmeter installed inside the dash for monitoring charging. Duc 999 radial m/c for brake and clutch. EBC 320mm brake discs
    NWS hugger. Equipment: Famsa tankbag,
    CBR 600 -07 MOSFET R&R FH008EE providing stable 14.4 - 14.5 V (with my wiring mod). Daytona heated grips with mccoi pwm controller and automatic chain oiler

  7. #7
    apriliaforum expert RAS's Avatar
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    Quote Originally Posted by deefred View Post
    Second gen mille use a lower oil pressure and them seem to have more rod bearing failures.
    Not up on my Mille generations - does that put our motors in that time frame?

    Do you remember what pressure that bigger spring allows? Would think that 70psi should be plenty enough.

    One nice thing of a motor tuned more for mid-range torque, we'll spend far less time (if ever, and in my world never) banging the limiter

  8. #8
    apriliaforum expert deefred's Avatar
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    Valid for single spark plug 990 only.
    2001 RST Futura in stream Silver.
    Mods: Modified Öhlins fork from mille R, EBC brake discs, HEL front brakelines, Carbon RS 250 front fender, Wiring mod for charging. Engine related:05 map, Iridium plugs, tuneboy, derestriced intake, old mille airboot, staintunes exhaust. Lambda bung hardbrazed in the "breadbox". Öhlins mille R rear shock with 110N/mm spring and the integrated hydraulic preload adjuster. LED Voltmeter installed inside the dash for monitoring charging. Duc 999 radial m/c for brake and clutch. EBC 320mm brake discs
    NWS hugger. Equipment: Famsa tankbag,
    CBR 600 -07 MOSFET R&R FH008EE providing stable 14.4 - 14.5 V (with my wiring mod). Daytona heated grips with mccoi pwm controller and automatic chain oiler

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