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  1. #1

    Unhappy 92 SL650 vibration at mid throttle

    Got a 92 SL650, new engine last summer, about 15 hours on it, ran perfectly until near the end of my last trip out.....I noticed it just started vibrating at mid throttle, it seems smooth at idle, gets real rough (in and out of water) at mid throttle and while accelerating, then seems to smooth out again at high RPM. Wondering if I should be concerned, thinking I should be Any suggestions on what to check would be appreciated!!


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Welcome to the Hulk j.

    It sounds like a motor mount may be bad, engine mounting bolts loose, pump bearings may be going bad, drive shaft may be bent, or stator vanes or impeller bent.

    If the engine was swapped out, and bolts didn't get loctite on them, or over torqued the motor mounts, I'd check there first.

    Or did you get a stick or rock stuck in the pump at all?

  3. #3
    Quote Originally Posted by xlint89 View Post
    Welcome to the Hulk j.

    It sounds like a motor mount may be bad, engine mounting bolts loose, pump bearings may be going bad, drive shaft may be bent, or stator vanes or impeller bent.

    If the engine was swapped out, and bolts didn't get loctite on them, or over torqued the motor mounts, I'd check there first.

    Or did you get a stick or rock stuck in the pump at all?
    Thanks Xlint89, I will check what you suggested. Come to think of it there was a lot of driftwood floating in the lake that day, I bet there is some inside the pump....thanks for your suggestions and for welcoming me to the forum

  4. #4
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    Did you aling the new engine to the pump when you installed it,you may have wore out the coupler if it wasn't stright.

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