new vs old rotors

Discussion in 'Electrical' started by crassius, May 29, 2016.

  1. crassius

    crassius Well-Known Member

    Had time today to compare several motors to see why newer rotors have slot at about 12:30, while old rotors have it at 1 o'clock.

    All motors I looked at that had unbalanced cranks had the old rotors, while all the balanced cranks had the new rotors.

    Timing appears to be same however, since new cranks have their slots offset by the same amount as the new rotors, but in other direction so timing is unchanged.

    Unless you feel a need to change your timing, you should NOT swap new rotors for old, as on wrong style crank, they will not time the same.

  2. jaguar

    jaguar Well-Known Member

    Hard to know what you are buying when the vendors don't specify details like this
  3. Frankenstein

    Frankenstein Well-Known Member

    It 80cc bicyle bike motor engine moped conversion kit, what more detail you need? Hurry up and buy!
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