Primary transmission for Vespa and parts

Fits perferctly replacing original 18 teeth gear

Included: Flexible coupling

Z 23-64 with straight teeth

Corsa 53

Main feature: increases ratio, with no need to disassemble clutch bell, increasing speed by 10 km/h

Complete kit with flexible coupling

Length 136 mm, bearing casing: 12 mm, bush casing: 9 mm.

The construction of the teeth is carried out with the module hob tool
1.5 with relative corrections for the pinions added to the pair
of origin.

The tooth width has been widened (1 mm inwards) for
have greater resistance without compromising smoothness.
The spring seats have been revised to use wire springs
painting. The longer stroke of the flexible coupling preserves gearbox and cruise.
In the center there is a roller bearing on the plus part
stressed and a guide bushing on the shank. This solution
allows the bell to be compatible with the gears of the
original start.

The construction of the teeth is carried out with the module hob tool
1.5 with relative corrections for the pinions added to the pair
of origin.

The tooth width has been widened (1 mm inwards) for
have greater resistance without compromising smoothness.
The spring seats have been revised to use wire springs
painting. The longer stroke of the flexible coupling preserves gearbox and cruise.
In the center there is a roller bearing on the plus part
stressed and a guide bushing on the shank. This solution
allows the bell to be compatible with the gears of the
original start.

The construction of the teeth is carried out with the module hob tool
1.5 with relative corrections for the pinions added to the pair
of origin.

The tooth width has been widened (1 mm inwards) for
have greater resistance without compromising smoothness.
The spring seats have been revised to use wire springs
painting. The longer stroke of the flexible coupling preserves gearbox and cruise.
In the center there is a roller bearing on the plus part
stressed and a guide bushing on the shank. This solution
allows the bell to be compatible with the gears of the
original start.

The construction of the teeth is carried out with the module hob tool
1.5 with relative corrections for the pinions added to the pair
of origin.

The tooth width has been widened (1 mm inwards) for
have greater resistance without compromising smoothness.
The spring seats have been revised to use wire springs
painting. The longer stroke of the flexible coupling preserves gearbox and cruise.
In the center there is a roller bearing on the plus part
stressed and a guide bushing on the shank. This solution
allows the bell to be compatible with the gears of the
original start.

La costruzione dei denti è realizzata con utensile creatore modulo
1.5 con relative correzioni per i pignoni aggiunti alla coppia
d’origine.

La costruzione dei denti è realizzata con utensile creatore modulo
1.5 con relative correzioni per i pignoni aggiunti alla coppia
d’origine.

La larghezza del dente è stata allargata (mm 1 verso l’interno) per
avere una maggiore resistenza senza compromettere la scorrevolezza.
Le sedi delle molle sono state riviste per utilizzare molle con filo
quadro. La corsa maggiore del parastrappi preserva cambio e crociera.
Al centro è presente un cuscinetto a rulli sulla parte più
sollecitata ed una bronzina di guida sul codolo. Questa soluzione
permette alla campana di essere compatibile con gli ingranaggi della
messa in moto originali.