replacing crankshaft seal

Discussion in 'Motorized Bicycle Trouble Shooting' started by sboricic123, Jul 10, 2013.

  1. sboricic123

    sboricic123 Member

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    Is it an easy task replacing the crankshaft seal on a China girl 66cc?
    Are there things I should watch out for?
     
  2. 2door

    2door Moderator
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  3. crassius

    crassius Active Member

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    also, pry upwards on the ends of the crank to be sure the mains aren't loose

    if loose, they need replacing as the seal won't work if the crank is moving up and down
     
  4. sboricic123

    sboricic123 Member

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    I purchased a crankcase seal from a dealer that deals mostly with Skyhawk engines. I installed it but it doesn't seem to fit snug behind the magneto magdet. Is there a difference between the seals for each engine or could I possible have purchased the wrong seal?
     
  5. crassius

    crassius Active Member

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    on most engines, the clutch side seal is wider than the magneto side
     
  6. sboricic123

    sboricic123 Member

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  7. crassius

    crassius Active Member

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    sorry, never heard of that store

    no info there about the seal and I also looked at a crank bearing, but no info there either except that the pic showed some kind of sealed bearing

    search around this board & you'll see a post somewhere about ordering seala as a pair
     
  8. 2door

    2door Moderator
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    I'm not suggesting one vendor over another but just linking this page to you so you can see a comparison between the thick and thin seals. http://www.pistonbikes.com/category-s/10.htm Most of our advertisers carry these seals.
    The thinner one goes behind the magneto rotor; the thicker one behind the primary gear on the right side.

    Tom
     
  9. sboricic123

    sboricic123 Member

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    2Door. Thanks for that link. To bad they don't ship to Canada. I'll have to Google and see what other shops there are. I may check a few small engine shops in my area to see if they might have one.
     

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