Washer on crankshaft under clutch from bgm Pro

The washer between the crankshaft and the clutch has three very important tasks to fulfill:

• To create the controlled preload between the crankshaft and the ball bearing
• To provide a plain bearing surface for the clutch sprocket during clutch operation
• To create the correct distance between the clutch and the bearing so that the gearing aligns with the primary gear and the correct gap to the clutch cover is maintained

PROBLEMS WITH ORIGINAL WASHERS
Depending on the residue of the crankshaft stub in the ball bearing, the washer in Largeframe engines is exposed to very high bending moments. Under unfavorable circumstances (washer was mounted the wrong way, crankshaft has too much residue, too high a tightening torque on the clutch), even the otherwise good original Piaggio washers are overwhelmed and tear/break.

SOLUTION THROUGH THE BGM PRO WASHERS
The bgm Pro washers correspond in their dimensions to the original Piaggio components, but are manufactured from extremely tough yet sufficiently elastic material. They also feature radii on both sides, which precludes incorrect mounting. Additionally, the bgm Pro washer features radii in the groove for the half-moon key. In the original Piaggio part, the sharp edges present there initially trigger crack formation. This effect no longer exists with the bgm thrust washer.

NOTE: The bgm Pro washers intentionally have a flat surface so that the clutch can disengage perfectly. The often offered washers with a shoulder or angle, which are intended to provide more space for the clutch sprocket to disengage, achieve exactly the opposite. The clutch does not disengage cleanly because the sprocket and steel washer sink too deep into the basket and the linings make contact again. With the BGM washer, the sprocket runs exactly defined on the smooth surface and at the correct height, whereby the clutch disengages very cleanly.

About the manufacturer BGM

BGM is a leading brand for high-quality spare parts and accessories for scooters, motorcycles, and classic Vespa models, standing for quality, precision, and innovation. With an uncompromising "Made in Germany" philosophy, BGM develops durable products in cooperation with leading engineers and under strict quality controls. Whether restoring vintage vehicles or tuning modern scooters – BGM is the first choice for demanding riders. Thanks to first-class workmanship and a wide range, BGM offers ideal solutions for performance, everyday use, and individuality.