Shoulder ring kit 2.00-2.50mm (+0.0 /- 0.04mm) - 6 pcs - BGM ORIGI

The BGM reduction gear shoulder rings are manufactured with high precision. They are hardened and ground parallel to the plane with an accuracy of one hundredth of a millimeter. This ensures that they correspond exactly to the specified dimensions. The quality assurance guarantees a maximum deviation of only four hundredths of a millimeter undersized. This makes BGM discs much more precise than Piaggio shoulder rings.

WHY the

Shoulder rings are used to compensate for the axial play between the gears. The spacing of the gear wheels is essential for a clean work shift. The closer the play is chosen, the less the gears can slip sideways. The shifting becomes more precise because the shift paddle engages exactly in the center of the gear wheel and does not push it away. It is therefore worthwhile to measure the gear accurately.

HOW MUCH

Piaggio's clearance is 0.15-0.40mm. It is determined with a feeler gauge between the gear wheel and the shoulder ring.

DIFFERENCE

The shoulder rings are originally available in two versions

:

Thickness (2.0-2.5mm original with only one nose) suitable for Vespa Largeframe from 1952-1984

Thin (0.9-1.4mm with four noses) suitable for Vespa Smallframe and Vespa Largeframe from 1984 onwards (main shaft with two shoulder rings/sea rings)

OLDIES

The thick version of the shoulder rings for Vespa with large frame before 1984 has long been no longer available from Piaggio. Thanks to bgm PRO, the corresponding shoulder rings in the range from 2 mm to 2.50 mm are finally available again for these gearboxes.

As a deviation from the original, they have, as in the more stable Vespa PX Lusso version, 4 locking lugs. The knocking of the single nose is therefore no longer possible in the new design.

TIP: The exact determination of the play between the gear wheels is only possible with a feeler gauge (see accessories). Don't forget a new BGM Pro gear cross and gear oil.