Primary gear ratio for clutch Kingshaft/Crimaz CMX -BENELLI reinforced/straight-toothed- Vespa Largeframe PX, Rally, Sprint, Cosa, T5, LML 2T - 23/60 (2.61)

Benelli primary kit for Vespa Largeframe engines

Gear parts from Stefano Benelli have rightly earned an excellent reputation in the racing scene. If you are looking for reliable racing technology for your gearbox, you will find it here.
Hardened to an average of 60 HRC, Benelli parts offer the perfect balance between sufficient hardness and the necessary elasticity to withstand the enormous stresses in a racing engine over the long term. Benelli offers a reinforced primary kit for Vespa Largeframe engines with wide primary gear (from around model year 1965).

This kit offers some special features:

• Screwed cover plate = no riveting necessary!

• very wide selection of gear ratios = ultra-short (3.25) to ultra-long (2.40)

• Clutch gear for PX old type clutch (6/7 springs) = suitable for clutches from Kingwelle or Crimaz CMX

The delivery includes the original primary springs of the PX200 models.

For powerful engines we recommend reinforced primary springs that can handle the high torque of a tuned engine. Unlike original springs, these no longer go to block. This means that the springs are not fully compressed but still provide sufficient travel. As a result, load peaks are no longer transferred to the gearbox and the components are protected despite higher engine power. The primary kit is supplied ready to install and features a screwed reinforced cover plate for the primary springs.
The other side is closed, i.e. it has been machined from solid together with the gear.

ASSEMBLY NOTE
If the set is used in a Malossi housing (VR-One / V-One), the bearing seat of the large crankshaft bearing must be slightly relieved.
Otherwise the primary gear will touch the reinforced bearing seat of the Malossi housings.

(US)