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Help ZR250 Gearbox bearing replacement

Discussion in 'Kawasaki 250cc In-line 4's' started by Klapparbaver, Jun 7, 2021.

  1. Klapparbaver

    Klapparbaver Active Member Premium Member

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    Location:
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    My Bike:
    1998 ZR250 Balius / 2000 ZX9R
    Soooo, got a nasty whining noise coming out of the bike when accelerating/ load on the drivetrain. Goes away as soon as the clutch is in or when decelerating. The whine is rpm related not road speed related so im guessing its the gearbox bearings. Can't feel any play in the front sprocket either in and out or up and down. the shift shaft has a bit of play in and out.
    How shitty is it to replace the gearbox bearings? Can it be done from the bottom of the engine or is it a complete disassemble job?
     
    Klapparbaver, Jun 7, 2021
    #1
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
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    Engine out and split job to do gearbox bearings. I would suspect your noise might be the primary drive (the big gear behind the clutch), very common on straight cut gears.
     
    Linkin, Jun 7, 2021
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