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Thread: vibration in motor

  1. #1
    Join Date
    Nov 2003
    Location
    ST.LOUIS
    Posts
    309

    vibration in motor

    well i just had my flywheel shaved and put the engine back together and now there is so much vibration i can't hang on to it. i did do a complete tear down and replaced the crank. does the flywheel being shaved 9 oz. cauze that much vibration or did i possibly get the counter balance off a tooth? what do you think?
    a 02 426 ex 13:5:1 je piston port and polish, hotrod crank and hd rod, 44mm lectron on nitro/alcohol, lightened flywheel, air box eliminator, 5" over swing arm,shaw shocks .

  2. #2
    Join Date
    Nov 2003
    Location
    ST.LOUIS
    Posts
    309
    bump
    a 02 426 ex 13:5:1 je piston port and polish, hotrod crank and hd rod, 44mm lectron on nitro/alcohol, lightened flywheel, air box eliminator, 5" over swing arm,shaw shocks .

  3. #3
    Join Date
    Feb 2002
    Location
    Mansfield,OH
    Posts
    4,605
    Its more likely that the counter balancer is off. I've used a few diffrent combos of lightend flywheels and have never noticed a lot of vibration.

  4. #4
    Join Date
    Sep 2005
    Location
    wales
    Posts
    9
    if i was you i would take the front spocket up 1-2 teeth,if not then youve had it shaved to much
    l warren

  5. #5
    Join Date
    May 2001
    Location
    Uwharrie, NC
    Posts
    1,519

    Re: vibration in motor

    Originally posted by SHADETREE101
    well i just had my flywheel shaved and put the engine back together and now there is so much vibration i can't hang on to it. i did do a complete tear down and replaced the crank. does the flywheel being shaved 9 oz. cauze that much vibration or did i possibly get the counter balance off a tooth? what do you think?
    Check what Kfulk said above and also
    It could very well be the flywheel wasent balanced after cutting down. Even if it was turnd on a lathe it still should be spun and any heavy spots removed.
    96 KX250
    86 Asphalt 330R

  6. #6
    Join Date
    Nov 2003
    Location
    ST.LOUIS
    Posts
    309
    well i tore it back down and the counter balance was off, i guess it jumped a tooth while i was installing it. thanks for all that replied.
    a 02 426 ex 13:5:1 je piston port and polish, hotrod crank and hd rod, 44mm lectron on nitro/alcohol, lightened flywheel, air box eliminator, 5" over swing arm,shaw shocks .

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