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Thread: rpms 97 785 pro

  1. #1

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    rpms 97 785 pro

    hi all again i got the new stator in and it is working good but i was just wordering about the rpms when it is out of the water it goes up to the limiter but when it is in the water i only get about 6800 at wot y is this and i am doing 76kph that is wat the mfd is saying


  2. #2
    ph2ocraft's Avatar
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    I thought it was in the 7500 RPM range with a 7800 RPM limit??
    6800 is low.
    Some possibilities.
    Impeller
    Exhaust Leak
    Exhaust Valves
    Restricted Fuel Supply

    How do the plugs and/or piston wash look?
    What's your timing set at?
    Plug Gap .024-.028

  3. #3

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    your rpm's should be no less than 7600 ,ride with the seat off and make sure your exhaust valves are opening and double check your wiring from the stator to make sure you didn't mix any of them up .in fact check all your wiring . and what rpm's where you getting before ???

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    When you installed the stator, did you line up the mark on the stator plate with the case halves "seam" line?

  5. #5

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    hay there wat do u meen case halves "seam" line i just put it back to were the old one was all my exhaust valves are opening i think i may have a crack pipe somewere cos it revs out when it is not in the water to like 7800
    Last edited by daza; 01-28-2008 at 01:12 AM.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by daza View Post
    [...what do you mean case halves "seam" line. I just put it back to where the old one was.
    All my exhaust valves are opening.
    I think i may have a cracked pipe somewhere because it revs up when it is not in the water to like 7800]
    The place where the upper and lower halves of the crankcase meet is called the seam, or parting line, and you use the seam line to rotate the stator until the alignment mark on the stator matches the adjacent seam line.

    How the stator is mounted relative to the seam line affects the spark timing. The possibility is that you have mounted the stator such that the spark timing is retarded, which will reduce maximum power at peak RPM.

    The timing can also be affected if the flywheel was not properly positioned on the crankshaft nose when it was tightened down. The indexing woodruff key was properly in place when the flywheel was reinstalled - correct?

    You MAY be able to check the stator timing without pulling the flywheel off again. Search the technical material for info on checking Fuji stator timing.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7

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    ok i worked all day on it i pulled the head off and the wash is good i pulled the pipes off and there are no leaks i pulled the flywheel off and moved the stator more to the upper mark and that has made a bit of difference it goes up to 8000 rpms alot better that is out of the water i am going to test it in the water 2moro and i also ajusted the Exhaust Valves so we will see how it goes tomoro is there nething else i shoud check

  8. #8
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by daza View Post
    ok i worked all day on it i pulled the head off and the wash is good i pulled the pipes off and there are no leaks i pulled the flywheel off and moved the stator more to the upper mark and that has made a bit of difference it goes up to 8000 rpms alot better that is out of the water i am going to test it in the water 2moro and i also ajusted the Exhaust Valves so we will see how it goes tomoro is there nething else i shoud check
    Muffler bearings.

  9. #9

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    o ok what the hell are thoes and were do i find them sorry 4 being dum

  10. #10
    ph2ocraft's Avatar
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    How did you check the exhaust system for leaks?
    I don't know on the 785's but I think they need to hold 6 pounds of pressure.

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