Racing Exhaust Performance Mustang 2.1 Design

for Vespa 200 Rally/
200E/
X200 E/
usso ->’94/
osa 1 200
steel
clear coated
w/o silencer silencer
with lambda and EGT connection
TUNING SPORT – high-performance
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.
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.
The systems created by Tobi R

ann for the 200cc Vespa largeframe models represent an absolute benchmark in the world of exhaust manufacture. The limited space between the cylinder studs that leave the transfer ports with a restricted amount of air to breathe is his area of speciality and the design of his exhausts makes the best out of this unusual motor layout.
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 2.1
The Mustang 2.1 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.
Compared to the 2, the 2.1 shows changes in a few small but important details. The sheet thickness has increased to 1.2 – 1.5mm. The bracket has a slightly different structure, is more stable and more accessible. The metal sheets for the bracket are brazed and are supposed to absorb vibrations better. The exhaust is no longer painted in a glossy clear color, but has a matt clear coating. The coating is even more heat-resistant than the paint.
The Mustang 2.1 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 II exhaust the port timings of the cylinder require adjustment to match the layout of the pipe.

Transfer port timing : 130
-138

Exhaust port timing : 188
-198

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.
SIP- 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.