Racing Exhaust PERFORMANCE MUSTANG Design

for Vespa T5
stainless steel polished
w/o silencer silencer
left hand
with lambda and EGT connection
TUNING RACE – for professionals
For race use only. Not admitted in the area of the German StVZO! Product description
Very high performance race exhaust with an especially wide power-band suitable for everyday use.
High-end exhaust systems from a high-end Vespa tuning shop, in serial production by. Where a four-stroke motor requires valves, camshaft, exhaust and a turbo, a two-stroke just requires a well designed exhaust. A few pieces of sheet-metal modelled to create a form that harmonises perfectly with the layout and size of the openings in the cylinders bore, known as transfer and exhaust ports. The design of the resonance chamber not only influences the removal of hot exhaust gases, but the pulse effect also affects the flow of fresh fuel mixture into the cylinder. On modern two-strokes this technology is the main reason for its superiority over the four-stroke motor.
As simple as the description may seem, the creation of a properly formed expansion chamber body is a science for itself. This is where the wheat is separated from the chaff. Really good exhaust fabricators are as rare as uncooked steak and often only maintain limited production runs, making their products usually expensive.
NORDSPEED, based near Bremen in northern Germany, enjoy an almost legendary reputation as far as the production of excellent race exhausts for vintage geared Vespa and Lambretta scooters is concerned.
and NORDSPEED have combined their efforts in this field and the result are exhaust systems with the most powerful design, coupled with modern features such as EGT and a lambda sensor connection possibility.
Technical specifications of all by NORDSPEED exhaust systems :

O-ring flange, suitable for all common cylinders.

EGT connector.

Lambda sensor connector.

Flange plate allows the attachment of most common silencers.
Mustang T5
The Mustang T5 represents a measured compromise between high-revving, maximum performance systems like the R2 and the types designed for a strong torque delivery. It possesses a very wide power-band and supplies, despite its useful everyday elasticity, a very high maximum power output. This places the Mustang II amongst the strongest systems available in this segment of the market.
The Mustang T5 can only really show its complete potential when combined with suitable peripheral components such as a larger dimensioned carburettor, suitably modified inlet ports and naturally a performance cylinder that is equipped with voluminous transfer ports.
To ensure the correct function of the Mustang T5 exhaust the port timings of the cylinder require adjustment to match the layout of the pipe.

Transfer port timing : 125
-130

Exhaust port timing : 188
-194

Blow down timing : 30
-32

Conclusion :
The perfect exhaust to complement a very strong road-going motor set up, complete with a wide power-band and a balanced combination of strong torque and high power.

TIP : A well set up carburettor and ignition are essential for a reliable motor. Tools such as a strobe lamp (#FS118600) and a degree disc (#83002000) are available in the shop. The jets for the carburettor set up should be from the same reputable manufacturer, as numerous producers work with different manufacturing tolerances. We recommend the purchase of a jetting kit from either or KMT.