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As in Mary Shelley's famous story (Frankenstein), also rolls the dice Maryzabel Pieces of different origins together to - hopefully - bring a legend to life.

A central part of Platonica is the LML frame set. A set consisting of all sheet metal parts of the Vespa PX and directly painted. Sets that are unfortunately only available in limited numbers, as LML has unfortunately no longer existed since 2018.

We reported:

But back to the Platónika plot: One of our LML frame sets replaces the old and rusty Vespa frame, whose soul it takes over when the old frame number is hammered in.

The inner values ​​of Platónika are mainly determined by the bgm PRO Share determined. For example from the most recent evolutionary stage of the bgm PRO ignition stator plates. The completely redesigned stator features small details such as a degree scale for easier and faster setting of the pre-ignition value or the silicone cables, which are more durable, easier to lay and significantly more temperature-resistant.

Let there be light!

A highlight of the electrical system is definitely the powerful one LED headlights from Moto Nostra. Compared to the conventional BA20d bulb with 35 watts, it impresses with its three times higher luminosity (1300 lumens instead of 400 lumens) with a consumption of only 20 watts.

 

It took some time to breathe life into the electrics, which have been converted to direct current. Seven months to be precise, during which Mr. Stroh and I - his faithful assistant - used our rather limited free time to get everything sorted.

3 She's alive! - Project Platónika Vespa PX bgm 177 by Scooter Center

After the rough structure was in place, we took care of the detailed work and brought all rubbers, accessories and other peripherals to the start.

Music:

Artist: Kevin MacLeod Title: Georges Bizet: Habanera Album: Classical Sampler License: CC-BY

Original Audio movie "The Bride of Frankenstein" TM & © Universal (1935)

 

https://blog.scooter-center.com/das-herzstueck-vespa-platonika-bgm-177/

 

Like Mary Shelley's famous story (Frankenstein), maryZabel would also combine parts of differents origins to bring a legend to life.

Platonica Platónika is made of a chassis from the last production run of the LML factory. The factory that sadly went bankrupt in 2018 and of which we bought the last production run of frames.

(look here our visit “before the final end”)

Back to the plot one of these sets is used to replace the old and rusty Vespa chassis, from which it adopts its soul by rewriting the frame number.

The intrinsic values ​​are determined mainly by the bgm PRO range of parts. Like the latest version of the bgm PRO stator plate, that includes as one of the nice details, the degree reading on the base plate to make timing adjustment much easier. The silicone wiring guarantees greater protection, duration and extreme resistance to temperature.

Let there be light!

And the light was made, embracing the modernity, with the high-power LED headlightof Moto Nostra. Which luminosity is three times higher (1300 lumens, instead of 400 of the usual bulb) with a much lower consumption (20W instead of the usual 35W).

Expose it to a spark of life with direct current, would take a considerable amount of time -7 months to be exactly- where Mr. Stroh and I, his faithful assistant, dedicated the limited hours available to such a noble laboratory.

3 She's alive! - Project Platónika Vespa PX bgm 177 by Scooter Center

With the shell ready, it is time to take care of the details, including all the rubbers, rivets and accessories find their place.

 

Music:

Artist: Kevin MacLeod - Title: Georges Bizet: Habanera - Album: Classical Sampler - License: CC-BY

Original Audio movie "The Bride of Frankenstein" TM & © Universal (1935)

 

https://blog.scooter-center.com/es/el-corazon-vespa-platonika-bgm-177/

 

Al igual que famous historia de Mary Shelley (Frankenstein), maryzabel también combinaría partes de differentes orígenes para traer a la vida una leyenda.

Platonica esta hecha con uno de los chassis which Scooter Center compró a la ya extinta LML en su ultima production y que desafortunadamente quebró en 2018. (Míra nuestra visit here antes de su cierre)

Cuyo chasis (volviendo a nuestra historia) reemplazaria a la oxidada Vespa, de quién adoptaría su alma regrabando sus números de series.

The spark of life

En su interior también coexiste la version más reciente del encendido bgm per que incluye, como uno de sus detalles, las marcas de ajuste de grados directamente en el plato, para hacer más fácil su ajuste. Un cableado recubierto con fibra textile que garantiza mayor protección, duración y resistencia a la temperatura.

Let there be light

Y la luz se hizo, abrazando las novedades que trae consigo la modernidad, gracias al piloto trasero and faro LED de high power LED de moto nostra, cuya luminosidad it tres veces mayor (1300 lúmenes) por mucho menos consumed (20 W).

Exponerla a una chispa de vida con corriente continua, llevaría un tiempo considerable, 7 meses exactamente, en dónde Mr. Stroh y yo, su fell asistente, dedicamos las limitadas horas available a tan noble laboratory.

3 She's alive! - Project Platónika Vespa PX bgm 177 by Scooter Center

 

Con el cascarón armado, it momento de cuidar de los details y darle forma, para que todos las gomas, remaches y accesorios encuentren su lugar.

 

 

Music:

Artista: Kevin MacLeod - Título: Georges Bizet: Habanera - Album: Classical Sampler - Licencia: CC-BY

Original Audio movie "The Bride of Frankenstein" TM & © Universal (1935)

 

https://blog.scooter-center.com/es/el-corazon-vespa-platonika-bgm-177/

 

Deep insights

I am quite fortunate to have direct access to the bgm development team. The guys who brought the BGM 177 from the first prototype to the production-ready product are at my side with advice and practical help. A good starting point for Platónika's heart.
The entire SC team is driven by the enthusiasm for scooters. Many have been driving for decades and know what works best, why, how and for what purpose. In combination with 27 years of experience as one of the leading scooter shops, an unbeatable combination. Which flows directly into the bgm products.

The parts!

Wie der  BGM PRO 177 cylinderthat breathes life into the engine. Jamming, broken pistons or rings are a thing of the past thanks to the modern design and the ingenious concept:

Or can BGM PRO BigBox TOURING (BBT),
Thanks to the classic look, one completely underestimates the performance of this system. Both the standard optics and the moderate sound make you almost forget that this is the reference system for the speakers.

Knowing that a few degrees can make all the difference, she comes BGM Pro Touring crankshaft  with appropriate timing. This means that the filling is correct over the entire speed range and the dreaded spitback from the carburetor is eliminated.

And the best thing is that the products are subject to constant further development and, if possible, improved. If you'd like to be kept up to date, don't miss our tutorials on the parts.

2 The Heart - Vespa Platónika by Scooter Center

Jahzzar - Railroads Whiskey Co
Artist: Jahzzar
Title: Railroads Whiskey Co
Album: Home (Excerpt
License: CC-BY-SA

And last but not least
Rene Winkler from Scooter Center
Song: code-red-no-clean-sweep-master-5

https://blog.scooter-center.com/es/la-lista-de-deseos-vespa-platonika-bgm-177/

 

deep knowledge

I am in the very lucky situation to have direct contact to the developers of the BGM range of products in SC. So I was in the position to get first-hand experience advice from the guys who build the first prototype of the cylinder kit that makes Platónika's heart now.
All of the SC staff is driven by their excitement for scooters. They are using it for decades and really know what works for what reason. Combined with 27 years of experience as one of the leading scooter shops in the world they have a second to none experience. And with the bgm range they create products of unique quality.

The products!

Like the Cylinders BGM PRO 177  that would give life to the engine.
An overheating, a braked piston or broken piston rings, will be a thing of the past, thanks to its modern design and materials, whose resistance is unequalled and for a very reasonable price.

Or the BGM PRO BigBox TOURING Exhaust,
which traditional appearance fooled me. Without looking like (neither visually nor by hearing it) Its performance easily overcomes the competition in the touring category.

Knowing that a fraction of millimeters makes the difference Crankshaft BGM Pro Touring  corrects the long timings of the Italian crankshafts, achieving an incomparable smoothness and stability at low revs but enduring an engine power up to 20 HP.

The best thing is that these products are evolving; if you also want to know these and more details firsthand, don'Don't miss the tutorials and reviews that are on the way.

2 The Heart - Vespa Platónika by Scooter Center

Jahzzar - Railroads Whiskey Co
Artist: Jahzzar
Title: Railroads Whiskey Co
Album: Home (Excerpt
License: CC-BY-SA

And last but not least
Rene Winkler from Scooter Center
Song: code-red-no-clean-sweep-master-5

https://blog.scooter-center.com/es/la-lista-de-deseos-vespa-platonika-bgm-177/

 

Cylinder -BGM PRO 177/187 cc (piston made by Meteor) - Vespa PX125, PX150, Cosa125, Cosa150, GTR125, TS125, Sprint Veloce (VLB1T 0150001-)

Our Vespa 177ccm cylinder is available again

Today is a big delivery bgm Vespa 177cc cylinder came.

Buy here here

Info and data sheet

ASSEMBLY BGM 177 VESPA CYLINDER

All components must be cleaned thoroughly before installation. By selecting the cylinder seals, a squeeze dimension must be established in the specified area. The use of the cylinder head gasket is not absolutely necessary. The recommendation for the basic setting is a squeeze dimension of 1,0 mm. Observe the tightening torque on the cylinder head and tighten the nuts crosswise step by step.

BGM 177 RETRACT VESPA CYLINDER

After the cylinder has been properly installed, the engine should be warmed up for 60 minutes with load changes up to a maximum of 5000min? ¹. After this process, the engine can deliver its full power and is to be regarded as run-in.

FUEL-OIL MIXING RATIO

For normal use without a resonance exhaust system and with a 24mm carburetor, we recommend a mixing ratio of 2% with high-quality, fully synthetic mixed oil, eg BGM4000. For racing use or when using resonance exhaust systems and larger carburetors, we recommend a mixing ratio of 3% with high-quality, fully synthetic mixed oil, eg BGM4000.

BGM177 Tuning Cylinder Kit Vespa -Preview-

 

 

Buy here here

 

Cylinder -BGM PRO 177/187 cc (piston made by Meteor) - Vespa PX125, PX150, Cosa125, Cosa150, GTR125, TS125, Sprint Veloce (VLB1T 0150001-)

New cilindro de 177cc está de nuevo available

Hoy hemos recibido una great cantidad de cilindro's bgm de 177cc. Para vosotros it ideal, porque hoy podéis aprovechar todavía del 10% de descuento.

¡Recordad que hoy se acaba nuestra Scooter Center Cyber ​​Week con un 10% de descuento en todos los productos!

Shop now

 

Information y data sheet

MONTAJE DEL CILINDRO BGM 177 VESPA

Antes de montar el cilindro es imprescindible limpiar meticulosamente todas sus partes. El squish recomendado se consigue mediante una junta de cilindro apropiada. No es obligatorio montar una junta culata. Para empezar recomendamos un squish de 1,0 mm. Por favor, tener en cuenta el par de apriete en la culata y apretar las tuercas al aplicar la norma de apriete en cruz.

RODAJE DEL CILINDRO BGM 177 VESPA

Después de haber montado profesionalmente el cilindro, se recomienda hacerle un buen rodaje durante 60 minutes, con cambios de carga hasta maximum 5000min-¹. Luego el cilindro puede desarrollar toda su potencia.

MEZCLA COMBUSTIBLE ACEITE

En el caso de haber montado un escape normal (es decir que no sea un escape de cámara de expansion) y un carburador de 24mm, recomendamos una mezcla del 2%, used aceite sintético de alta calidad, valley como BGM4000. Si queréis montar el presente cilindro para participar en carreras o para combinarlo con un escape de cámara de expansion y un carburador más grande, os recomendamos una mezcla del 3%, usando aceite sintético de alta calidad, valley como BGM4000.

BGM177 Tuning Cylinder Kit Vespa -Preview-

 

 

Shop now

 

Cylinder -BGM PRO 177/187 cc (piston made by Meteor) - Vespa PX125, PX150, Cosa125, Cosa150, GTR125, TS125, Sprint Veloce (VLB1T 0150001-)

Notre cylindre 177cc est de nouveau available

Nous venons de recevoir une grande quantity de Cylinders bgm de 177cc for Vespa.

buy now

 

information etc technical sheet

MOUNTING THE CYLINDER BGM 177 VESPA

Avant de monter le cylindre il est absolument indispensable de nettoyer soigneusement toutes ses pièces. Vous allez obtenir le squish préconisé à l'aide d'un joint de cylindre approprié. Le montage d'un joint de culasse n'est pas obligatoire. Pour commencer, nous vous recommandons and a squish of 1,0 mm. Merci de tenir compte du couple de serrage au niveau de la culasse et de serrer les écrous en croix.

RODAGE DU CYLINDER BGM 177 VESPA

Après l'installation professionnelle du cylindre il faut faire le rodage pendant 60 minutes en faisant varier le régime moteur jusqu'à 5000min-¹ au maximum. Un bon rodage vous permet de tirer le meilleur parti du cylindre après.

MÉLANGE CARBURANT HUILE

Si vous avez monté un pot d'échappement normal (c'est-à-dire un pot qui n'est pas un pot de compétition) et un carburateur de 24mm nous préconisons un mélange de 2%, en utilisant de l'huile synthétique de haute quality, telle que BGM4000. Si vous avez monté un pot de compétition et un carburateur plus wholesale, nous préconisons un mélange de 3%, en utilisant de l'huile synthétique de haute qualité, telle que BGM4000.

BGM177 Tuning Cylinder Kit Vespa -Preview-

 

 

buy now

 

Our cylinder 177cc is available again

Today we received a large number of bgm cylinders 177cc.

Buy Now
BGM177 Tuning Cylinder Kit Vespa -Preview-

 

 

Buy Now

 

Cylinder -BGM PRO 177/187 cc (piston made by Meteor) - Vespa PX125, PX150, Cosa125, Cosa150, GTR125, TS125, Sprint Veloce (VLB1T 0150001-)

Il nostro cilindro da 177cc by Vespa è nuovamente available

Oggi è arrivetauna large fornitura di cilindri da 177cc for Vespa.

Buy here

Information e technical

MONTAGGIO CILINDRO BGM 177 VESPA

Prima di montare il cilindro è necessario pulire tutti i componenti. Per ottenere lo squish consigliato è necessario utilizzare le giuste guarnizioni per cilindro. Non è necessario utilizzare the guarnizione per la testata del cilindro. Come inizio vi consigliamo uno squish di 1,00mm. Controllare la coppia di serraggio sulla testata del cilindro e avvitare i dadi in croce.

RODAGGIO DEL CILINDRO BGM 177 BY VESPA

Dopo aver montato il cilindro a regola d'arte consigliamo di effettuare il rodaggio per 60 minuti con cambio del carico fino a massimo 5.000 giri / min. Dopo aver effettuato la procedura di rodaggio, il motore si esprimerà in tutta la sua potenza.

MISCELA BENZINA-OLIO

To circulate the strada with a wide marmite and a 24mm carburettor, there is a miscela report of 2% with oil of the highest quality and complete sintetico, ad esempio BGM4000. Per le competizioni o se si fa uso di una marmitta a espansione so come anche di carburatori più grandi, consigliamo un rapporto di miscela pari al 3% con olio di ottima qualità e completamente sintetico, ad esempio BGM4000.

BGM177 Tuning Cylinder Kit Vespa -Preview-

 

 

Buy here

 

THIS IS 177

Order the bgm PRO 177/187 cylinder now

The 177 tuning cylinder for Vespa is now available again!

BGM1770

 

bgm177 vespa cylinder development

bgm 177 - the new 177 - cylinder for Vespa

In this post we have already introduced you to the new cylinder. Today we give you a little insight into the development of the cylinder. From the beginning of April 2016 the cylinder finally available!

bgm 177 - the development of the Vespa cylinder

Developing a two-stroke cylinder is very exciting.
Countless parameters that have to be taken into account, thousands of test bench runs, repeatedly measured, calculated, tested, thousands of kilometers of road tests ...

Everything to get a cylinder as a finished end product that high-torque and willing to perform is, but also at the same time durable is and uses little fuel.
At the same time, it should offer the broadest possible range of applications for touring riders who simply combine it with series components, as well as for the sporty, ambitious tuner who is more concerned with performance.

Here is a little insight into the test series that were on the daily program for the BGM177.

THIS IS 177

OVERCURRENT DESIGN

We have tested a wide variety of solutions for the external shape and design of the overcurrent channels.
We created various duct geometries, control angles and cylinder combustion chambers and compared them both on the road and on the test bench.

BGM177 cylinder test

TEST MOTORS SPRINT150

For some of the tests, in addition to an original Piaggio Sprint, we also used an LML engine housing with original inlet membrane control as a starting point.
The Sprint's motor housing is representative of the very small, original rotary valve inlet of the Largeframe Engines. The rotary valve inlet of a PX125 is only slightly larger than the inlet of the Sprint engines and the control angles of the crankshafts are almost identical. In terms of the expected output, this is the “most unattractive” starting position. Nevertheless, we wanted to know what performance can be expected with these basic requirements or, better yet, which performance can be achieved.

We presented the result on a Sprint engine with the 24mm SI carburetor of the PX200 in comparison to a 12HP 200 engine.

So that you can interpret the graph below a little better, just imagine a normal PX200. Up to approx. 90km / h something like acceleration can still be felt on a standard 200. This speed corresponds to about 5500min? ¹ of the motor. From this speed, the torque of a 200 engine drops so far that it takes some time to reach 100km / h (6000min? ¹). If you now compare these speed points of the blue curve with those of the red curve on the graph, you can see that the BGM177 is still increasing torque in this area. In other words, when the 200 slowly runs out of air, the BGM177 accelerates even further.

BGM177 vs PX200

BGM177_ROTARY_vs_PX200_std

TEST MOTOR LML150 MEMBRANE

Since the 125cc engine of the Vespa Sprint with the small rotary valve is too restrictive on the power delivery from a certain power and speed level onwards, we used an LML engine housing for various tests and comparisons. The LML motor housing offers the best prerequisites due to the diaphragm inlet that is already present at the factory and the large overflow channels in the housing. As a result, for example, an inlet that is too small or differently designed overflow channels can have no or only an insignificant influence on tests within a test series.

BGM177_9 023

So on the LML housing you can easily switch between an SI carburetor and a large, adult intake manifold.

We performed the tests in this area with a pre-series cylinder with small duct cutouts in the cylinder base
and started with a piston specially made for this test.

BGM177_9 015

The aim of the game was to find out how much space the piston must allow for the overflow duct due to its design in order to ensure good filling. The piston was manufactured in such a way that the clearance around the piston pin in the area of ​​the ÜS channels could be continuously modified by milling.
We tested each of these intermediate steps on our test bench to find out which shape or which combination works best.

Piston BGM177 V2

TEST OVERCURRENT CROSS SECTION, CYLINDER BASE

The test series below was run on an LML membrane motor with a 24 SI carburetor, BigBox Touring and pistons and ducts that have just been processed in different ways.
At this point in time, the cylinder head was still relatively highly compressed. With the cylinder head in series production, we have reduced the compression somewhat in favor of a broader performance curve.

In its original state, the test piston had the contour of an original PX piston. The piston skirt was closed on the red curve (similar to Piaggio, Polini, Grand Sport, ...)
In the blue curve, the piston has been exposed by a few millimeters in the area around the piston pin. The picture above shows such a piston.
The green curve shows the power curve with partially open overflow channels at the cylinder base and the machined piston. The released area of ​​the channels in the cylinder base corresponds to approx. 80% of the possible channel area that the cylinder can offer.

Comparison of the BGM177 piston and channel

  • RED CURVE: Closed piston skirt
  • BLUE CURVE: Half-open piston skirt
  • GREEN CURVE: Open piston skirt

The BGM177 can therefore be equipped with a gearbox from the 200 series engines without any problems and offers significantly better performance than the large 200 series engine.
The PX125 and PX150 motors were equipped with a gearbox from around 1982 that is almost identical to that of the PX200. With these engines, the primary drive can be extended directly in order to convert the gained power into speed.
The use of a primary gear with 64 teeth would be recommended here. Depending on the desired area of ​​application, the overall reduction can then be adjusted accordingly with the coupling pinion. The primary gear with 64 teeth offers the advantage that the bgm clutch pinions with 22, 23 and 24 teeth can be used.
This offers the possibility of changing the engine from “sporty short for the city (22/64)” to “Autobahn - everything that works (24/64)”.

In the next post we equip our LML test engine with different carburetors and intake manifolds ...

 

BGM177 the cylinder for Vespa PX

BGM177 - the new cylinder from bgm PRO

Cylinder -bgm PRO 177 cc- Vespa PX125, PX150, Sprint150, GTR125, TS125, Cosa125, Cosa150

Here we want you the new one BGM177 cylinder imagine the starting April 2016 will be available.

THIS IS 177

First video BGM177 - the 177 cylinder for Vespa

We showed the cylinder for the first time at the Scooterists Meltdown. The new Online Scooter Magazine SLUK interviewed Philipp and created an exclusive video for our new cylinder:

Suitable for all Vespa 125/150 Largeframe Engines with 3 overcurrent channels.
These include:

  • Vespa PX125,
  • Vespa PX150,
  • Sprint 150Veloce,
  • Vespa GTR125,
  • Vespa TS125 and the
  • Cosa 125/150 models.

BGM177_1

Powerful and reliable aluminum cylinder

With the BGM177 we provide you with a powerful and reliable companion.
Many ideas have flowed into the design of the cylinder, so that you can use the cylinder in one as possible wide performance range can use.

BGM1770

Like all modern cylinders, the BGM177 is also made of aluminum.
This has the advantage of very good heat dissipation, which benefits durability, consumption and performance.
A cast aluminum piston with two piston rings works in the extremely wear-resistant nickel-silicon-carbide-coated cylinder bore.

BGM177_8 002

 

Very light piston

Due to the design and the high silicon content in the material, the piston can be held very light at 193 grams with great thermal and mechanical stability.
This benefits the freedom of rotation and smoothness.
The 1mm thick piston rings are made by a well-known manufacturer in Italy who also supplies leading piston manufacturers such as Vertex and Meteor with high-quality piston rings. The slim rings minimize friction and thus increase performance. In addition, they enable the exhaust duct window to be expanded without any problems.
The piston pin has a biconical design, ie it is thinner at the ends than in the middle. This further helps to reduce the weight of the moving masses.

BGM177_8 011

Aluminum cylinder with ceramic coating and large transfer ports

In the cylinder, the large channel surfaces and the large volume of the overflow channels offer the best basic conditions for a broad performance characteristics , and a early onset of torque.

The BGM177 can be combined with simple series components such as the original SI20 carburetor and an original exhaust. This means that the BGM177 already offers a significant increase in performance. The modern design of the cylinder helps him too much low consumption values at the same time high torque from the lower speed range.

Cylinders with great tuning potential

If you are looking for more power, the BGM177 offers sufficient potential and options to achieve the Performance with little effort to raise further. The cylinder reacts very well to a larger carburetor and a supporting exhaust system, such as the bgm BigBox Touring Exhaust system.

The overflow channels in the cylinder base can be expanded very easily. The two large overflow channels on the left and right are only covered by a small sprue in this area. These can easily be opened with a small hand milling cutter. Here, either the cylinder can be adapted to an already revised motor housing or the full duct cross-section can be transferred to a motor housing.

CNC milled cylinder head

The CNC-milled cylinder head is with many cooling surfaces and thanks to the clearance in the middle of the cylinder head, as little heat as possible is bound above the combustion chamber.
In the franking there is also a possibility of a Temperature sensor to assemble. The temperature can be reliably tapped this close to the combustion chamber.
The usual methods, in which, for example, a temperature sensor with an adapter ring is mounted under the spark plug or screwed to a cooling fin on the outside using a thread, do not show any useful values. They only allow you to assess how warm the cooling air near the spark plug or how warm the cylinder head is on the outside of the cooling fin - in our opinion, these positions are simply unsuitable for reliably determining a temperature value. Therefore, bgm uses the positioning very close to the combustion chamber.

BGM177_8 016

Combustion chamber for a wide range of services

The combustion chamber geometry is designed for a wide range of performance. The shape of the combustion chamber cap also allows the use of strong resonance exhaust systems with an appropriately adapted pinch edge. On a 57mm stroke with a touring or box exhaust, the pinch edge can be adjusted to 1mm using the enclosed seals.
If the cylinder is operated with a resonance exhaust and a stroke of 60mm, we recommend that you start with the pinch edge at 1,2mm.

Valve timing 57mm

On a motor with a 57mm stroke you will achieve the following values ​​with a pinch edge of 1mm:

  • Compression 10,3: 1
  • Overcurrent angle 118 °
  • Outlet angle 171 °

The large length of the cylinder enables the cylinder head to be centered in the bore of the cylinder with a 4mm thick shoulder. Due to the shoulder, the cylinder head gasket is still perfectly centered even in the event of a stroke change and cannot stand in the combustion chamber. If the stroke is changed to 60mm, the cylinder can also be raised further, depending on the planned motor concept, in order to achieve significantly larger overcurrent angles.

Valve timing 60mm

On a motor with a 60mm stroke, the following values ​​are achieved with a pinch edge of 1mm:

  • Compression 10,8: 1
  • Overcurrent angle 123 °
  • Outlet angle 173 °

The outlet width is 42mm (66%) and therefore offers good conditions for a high-revving engine even with short control angles.

BGM177 vs PX 200 12hp

Plug & Play with a lot of power

Here is a comparison between a BGM177 and a standard Rally200 with 12PS Piaggio cylinder (comparable to a Vespa PX200 GS).

The BGM177 cylinder is unchanged in this attempt and is on a Sprint Veloce engine.
The inlet, crankshaft and ducts in the engine have not been machined.
Only one SI24 carburetor the 200cc model was assembled without adjusting the carburetor pan or the engine housing, as well as with a BGM BigBox Touring combined.

The spraying is very much based on the original 200ccm equipment:
Main air correction nozzle: 160
Mixing tube: BE3
Main jet: 125
Idle nozzle: 55/160
Air filter: standard (without additional holes)

The pre-ignition was set to 19 ° BC. set.

The broad power range (smooth lines) and the high available torque (dotted lines) from idle can already be seen very nicely on this not further optimized engine.

BGM177_ROTARY_vs_PX200_std

[Table id = 2 /]

In the next article we will then deal with increasing the performance of the cylinder. An LML membrane motor will serve as the basis for this.