Thermal units for Vespa and parts

alluminio
5 travasi
Ø 66,5mm
corsa 57mm
2 anelli pistone
Senza testa cilindro
incl. guarnizione di base

Head with central candle

Bore: 62 mm
Displacement: 172cc
Stroke: 57 mm

Barrel coating: Nikasil

This kit has been designed and studied for plug & play assembly,
it does not require any type of machining of the engine casing.
The developed power is 17 CV at 7000 rpm and reaches up to 8500 rpm if
correctly configured. In terms of performance and reliability
nothing to say, on this product 2 years of
road tests and in the summer of 2019 it covered 10,000 km to and fro
from North Kapp.
The realization of the kit is purely Artisan, coming from
rigorously Made in Italy sand castings to give those
characteristics of quality and reliability that distinguish it. IS
It can be installed on any type of low headlight housing 3
prisoners from the year 1953. Having the insert collar
in the short casing, it does not require any machining. Requires the
assembly of a shaft in stroke 57, connecting rod 110.
The kit is supplied with: head, cylinder, piston, reed valve,
intake manifold, exhaust manifold, rubber sleeve for
24 PHBL carburetor, gaskets and various bolts.

Bore: 63 mm-Stroke: 57 mm-Long wheelbase spark plug
The completely new and fully designed thermal group is born
starts to get the best result in terms of performance e
duration. Every aspect of the system has been studied to maximize the
mechanical strength, fluid dynamics and improve combustion: the
the result is a top-of-the-range kit for build quality and progress
technological.

Transfer: 3

Diameter: 52.5 mm

Stroke: 57 mm

Ø 16x59 mm

Ø 63mm
corsa 57mm
con SIP Road, dischi frizione, filtro aria POLINI, carburatore SI 24 (senza miscelatore), etc.

per gruppo termico 112 Polini

Cilindro 7 travasi in alluminio e canna con riporto in Nikasil con "Booster" di scarico.
Alesaggio diametro 63mm, corsa 57mm, cilindrata 177cc,
fasi travasi principali 117°, scarico 177°. Pistone in lega di alluminio bifascia Meteor

Testa in alluminio in pressofusione con 8 punti di fissaggio con banda di squish ad incasso
Segmenti in acciaio. Spinotto in acciaio. Fermi in acciaio.
Guarnizioni cilindro in carta/alluminio.
Collettore di scarico in acciaio zincato avvitato con guarnizione O-ring in Viton.

The new Zuera Big Bore cylinder kit features 60 mm bore

Exhaust port is much larger than the previous model improving performance.

To be tested by the most picky users!