aluminum mold
Ø 56 mm
long thread
angle 1.2 mm
11.5:1

In painted metal of gray color

For models with Electric Start

Cone 20 mm, stroke 53 mm, connecting rod 105 mm

Galvanized

Measurement: 3.50/10
ONLY for tubeless rims

Straight Teeth: No.26
Helical Teeth: No. 22

height: 34mm

By clicking on purchase, all available sizes will be displayed

l=83 mm
a=3.0/5.8 mm
steel, galvanized

Ø 42 mm
helical 22 teeth
for the primary 65 teeth
clutch: Ø 115mm

Measurements: 29x35x13 mm

Ø 42 mm
helical 22 teeth
for the primary 65 teeth
clutch: Ø 115mm

Motor oil cap “Old Style” perfectly similar to the original Piaggio with the word “OLIO” on the hexagon head,

suitable for all Vespa or Ape engines with M8 oil drain thread.

The special neodymium magnet embedded with very high magnetic power attracts all the micro ferrous material produced by the gear system, extending the life of the bearings.

Essential especially in modified engines where the gears are heavily stressed.

Units in the box: 1

only one screw and one fiber washer are provided.

The top cap for the oil fill does not need to be magnetized.

Z 24x61 with helical teeth
With shock absorber

Special kit of harmonic steel washers with preload

specifically to compensate for the play due to thermal excursions of Vespa cylinder studs.

These washers are fully compressed at 2 kgm (20 N/m) 
(tightening of Vespa studs) which usually falls within the
Piaggio guidelines between 1.7 and 2.2 Kgm

and compensates for the loosening of the studs subjected to heating and elongation.

Dimensions:

internal diameter 8.4 mm
external diameter 18 mm
thickness 2 mm
washer height at rest on average 2.4 mm
average excursion 0.4 mm

Special kit of harmonic steel washers with preload

specific for compensating the play of thermal excursions of Vespa cylinder studs.

These washers are fully compressed at 1.3kgm (tightening of Vespa studs)

and compensate for the loosening of the studs subjected to heating.

Dimensions:
internal diameter 7.5mm
external diameter 16.8mm
thickness 1.8mm

washer height at rest 2.18mm
excursion about 0.38mm

Enlarged 32mm collector specific for mounting on PROMA exhaust.

N.B. 32mm actual internal from the exhaust flange then increasing up to the socket!!

Technical features:

Socket made on a lathe from solid material with double attachment ring (see photo) to ensure absolute precision of insertion and better gas sealing compared to the original.

Exhaust flange with a 32mm internal hole perfectly matched, laser cut in 6mm thickness, stable and rectified after welding to have a flat surface with maximum sealing.

Given the generous diameter of the collector and the tight curvature radius, the remaining space for fixing the internal screw of the exhaust flange is very limited.

MD racing provides a stud with an internal hex key to be tightened correctly and a special nut with an 11mm hex instead of 13.

Ensure before assembly that the stud, once inserted into the cylinder and tightened, does not hit the internal curve of the collector, otherwise shorten it using an angle grinder.

BGM BigBox Sport V2 for Vespa PX200

Performance like a racing exhaust - appearance like a stock exhaust
The BGM BigBox Sport V2 is a purebred racing exhaust for Vespa, in the unsuspecting design of an original exhaust. It stands as a clear alternative to large and flashy resonance exhaust systems. The high level of performance clearly distinguishes the BBS2 from other exhaust systems. Designed for performance-oriented drivers who appreciate the benefits of a low-profile vehicle.

NEW BBS V2
The basic concept has been maintained and only adapted to the greater requirements due to the increased power and engine displacement. The BGM BBS2 (=Big Box Sport V2) has widened pipe sections both inside the box and in the exhaust area. This effectively prevents the power fade that often occurs with very powerful engines (over 30 HP).

Additionally, the often-criticized ground clearance of the manifold has been modified. The system is now fully suitable for daily use and has the same ground clearance as a comparable resonance exhaust. Like the Big Box Touring V2, the BBS2 is now also equipped with a connection between the manifold and the exhaust body.

REQUIREMENTS

Flywheel side: 25x38x15
Clutch side: 25x62x12

Composed of 3 cork discs + 2 steel discs

FASIT Material:
This material is a mixture of cellulose and synthetic fibers, asbestos-free, which ensures a very effective seal.
The same material is used to manufacture gaskets for modern engines.

HTQ Malossi gears for Vespa PX inherit the legacy of the first gear project produced by Malossi between the late 80s and early 90s.
Completely redesigned, this pair of primary gears uses a straight-tooth configuration instead of the standard helical gears.
Malossi has worked hard to ensure the exceptional quietness of the gears, achieved with special machining of the teeth and their contact surfaces, meticulously finished and verified with an involute tester.
HTQ Malossi gears are made using exclusively materials
that exceed the strict standards imposed by our technicians with rigorous tests and trials.
The final machining uses CNC machines, after which the HTQ Malossi gears undergo a complete thermochemical carburizing treatment at 900°C, giving them the required hardness and
resistance.
The size and quality of the finished gears are finally verified on Zeiss three-dimensional control machines.
Paired in pairs to ensure the correct operating clearance, HTQ Malossi gears are the most precious gift a true romantic enthusiast can give to their Vespa.

rotary disc valve
stroke: 57.0mm
connecting rod: 105.0mm
piston pin Ø 15mm

Note: Soft type with high heat resistance and maximum transmission power
Measurements: Diameter 7 mm, length 50 cm

rotary disc valve
stroke: 43.0mm
connecting rod: 87.0mm
cone 20/20mm, M12

4 Cork discs + 3 in steel

Connection to the cylinder complete