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Parts Identifying
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Bearings
Bearings are typically
designated by three numbers which denote the size of the bearing ex: 20
x 47 x 14. In this example the 20 is the inner hole dimension in
millimeters, the 47 is the outer bearing diameter in millimeters, and
the 14 is the thickness of the bearing in millimeters. Most bearings
also have a number printed on them ex: 6204 which is used by all
bearing manufacturers as standards.
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6204 (20x47x14): Deep groove ball bearing. Used in smallframe Vespas
at the flywheel side crank bearing and rear axle bearing. Used in large
frame bikes at the rear axle bearing. |
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6302 (15x42x13): Deep groove ball bearing. Used in large frame Vespas
in the input shaft (Xmas tree). |
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6303 (): Used in smallframe Vespas
as the clutch side crank bearing. |
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16005
(25x47x8): Deep groove ball bearing. Used in smallframe Vespas on
the input shaft as it passes through the casing and attaches to the
clutch. |
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Vespa
part number (25x62x12): Deep groove ball bearing. Used in large
frame Vespas on the clutch side of the crank. Impossible to find unless
ordered through a Vespa dealer as it is not a standard bearing size. |
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Vespa
part number (24x38x15): Two piece roller bearing. Used in large
frame P series Vespas on the flywheel side of the crank. Impossible to
find unless ordered through a Vespa dealer as it is not a standard
bearing size. |
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JL188
(29x35x12.5): One piece roller bearing. Used in large frame Vespas
where the axle passes through the flywheel casing at the selector box.
Impossible to find unless ordered through a Vespa dealer as it is not a
standard bearing size. |
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(25x62x12): Used on either side of the main crank on large frame
motors before the later 150 Sprint engines. |
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