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Flywheel Modifications?

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Old May 14, 2011 | 07:36 PM
  #1  
PinkFloydEffect's Avatar
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From: Gardner ☮ Boston ~ MA
Lightbulb Flywheel Modifications?

Are these modification to this flywheel? Came off a 250R 2 stroke engine.

So, the rusty bottom flywheel is on the motor, the one on top has a bunch of dents in it (came out of the extra parts bin):

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Is this pickup shaved down on purpose? Timing? The top one is squared off.
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Also, the bottom flywheel on the engine has 6 holes drilled in it:
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The top spare flywheel has only 2 holes, and in a complete different place on the wheel:
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^ Possibly some sort of balancing method or?
 
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Old May 15, 2011 | 02:04 AM
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Yeah. The round holes are there to balance it. I can't tell you anything else about it.
 
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Old May 15, 2011 | 01:45 PM
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Originally Posted by jumbofrank
Yeah. The round holes are there to balance it. I can't tell you anything else about it.
Hmm maybe someone will chime in with more info, why are they different you know maybe two different years? I can't imagine the casting mold would be THAT far off on each one to need that presise of a balance.
 
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