Primary gear repair kit -BGM PRO reinforced CNC- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 SS

Small upgrade kit for the primary transmission of all PV125, ET3, PK80-125 S/XL engines. The set massively strengthens the primary drive and makes it so only durable even for powerful engines. The massive CNC machined cover plate effectively prevents a break through the thin series discs and thus keeps the jerk damper springs in place.

Also available as a large upgrade kit with clutch basket (BGM0190).

Ideal complement to the BGM Pro Superstrong clutch

Reinforces the primary drive

Replaces the stock cover plates

Protects the entire drivetrain, especially the clutch

CNC reinforced: two-piece = easier installation

Fits all primary transmissions with stock jerk dampers (springs)

Usable with stock springs or reinforced BGM springs

Usable with all Vespa clutch types: V50/PV/ET3, XL1 (not XL2, use BGM0192F72 here)

Made

of 42CrMo4

Hardened (nitrided)

Made in Germany

This evolutionary stage of our popular HD primary kit now consists of only two components, greatly simplifying installation compared to the old version with loose sleeves and two cover

plates.

The kit does not fit the springless primary wheels of the 50cc models. Since these should also receive a longer gear ratio when the displacement is increased, the installation of the upgrade kit in a new primary reduction is possible without any problems.

In principle, such an upgrade kit should be used in any engine, not only in very powerful engines. The enormous torque of today's engines also demands the use of reinforced shock absorber springs. This prevents the too soft series springs from going on block and the lugs of the clutch linings from working their way into the basket.

Note: Depending on the manufacturer and tolerances of the primary used, it is possible that the CNC cover plate touches the bearing seat or its strut of the crankshaft bearing.
In this case, either distance the primary using spacers (see 'Accessories') or grind a slight radius on the bearing seat of the engine housing.

(US)
BLOG article (click)
It is now also suitable for the clutch baskets of the XL2 versions. _{AI-translation}