where can i find a planetary gear??

Discussion in 'Motorized Bicycle General Discussion' started by MadMaxed, Feb 19, 2015.

  1. MadMaxed

    MadMaxed New Member

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    One of the tooths broke off the planetary gear not the big one with the flower nut but the one that connects to it. Having a hard tie finding a spare one online.
     
  2. KCvale

    KCvale Well-Known Member

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    http://www.gasbike.net/bike-motor-part-small-bevel-wheel.html

    $5.

    Did you get a sprocket puller in your kit?
    And is the tiny woodruff key still good?
    They have both there too if you don't.
     
  3. MadMaxed

    MadMaxed New Member

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    Well I'm not sure how to get the thing off. Thanks for the link ;)
     
  4. KCvale

    KCvale Well-Known Member

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    Most kit come a dual purpose sprocket puller, I kept like 10 before I started throwing them away.

    It's black and has threads and wrench fitting all over it.
    One side pulls the drive sprocket, the other smaller side is for that crankshaft output drive sprocket.
     
  5. MadMaxed

    MadMaxed New Member

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    Okay I have one with the kit. I'm scared I'm gonna tear the thing up even more tho. His would I go about taking the gear off
     
  6. MadMaxed

    MadMaxed New Member

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    okay so i got it off. and appears to be no woodruff key in the housing the is a bunch of grind marks im assuming it either disintegrated or it behind the larger gear along with the tooth that broke off
     
  7. KCvale

    KCvale Well-Known Member

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    Yep.
    Chances are something in the drive train bound up seizing everything to the actual gear on the crank shaft.

    It's a tiny little keyway, half moon woodruff style opposed to the more common straight keys.

    It's a pain to get back on too as you will soon see, just make sure to use all other parts put back in order and tighten that gear down by keeping the crank shaft from moving..

    Something semi-soft through the plug hole to hold the piston just a tad before TDC works.

    This internal connection from the engines crank shaft to a big gear reduction to the output shaft is crucial #1.
     
  8. MadMaxed

    MadMaxed New Member

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    so this is what i bought


    http://www.ebay.com/itm/191515249776?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT



    http://www.ebay.com/itm/181474272053?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT


    i figured a new screw as well wouldnt hurt and sure didnt want any china parts.

    so getting the gear back on... it seems to stick out a little further than what i remember
     

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