7 On the Road - Vespa bgm Platónika project by Scooter Center
As we would say in Colombia: “I'm in my salsa * " (it means that I am fully in my element). I received Platónika with 18 km and exactly 15 days later, she had a thousand km more.
Completely excited because spring is already there colors I started to drive. And even put together a Motonostra accessory set for touring:
But with this German weather you never know! And sure enough, a week later it starts snowing ... that shouldn't stop me, so I'll protect myself from the harsh cold and keep going.
Pictures and videos come and go, but I still think I'm missing something. The reason I fell in love with this scene: Indeed, their Vespisti.
No meetings in sight, "then I'll go with my colleagues" I thought, but who could go with me? in the marketing office where i'm sitting i only have the two of them Lambretistas found…
And now ... why not?
Did you miss any details of Platónika's story? You can find the full story here.
Platónika project - the complete story - Vespa PX bgm 177 by Scooter Center
https://blog.scooter-center.com/wp-content/uploads/2021/04/Yz-on-the-road.jpg9321440Maryzahttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngMaryza2021-04-16 10:55:192021-10-21 14:32:037 Platónika project - On the road
I'm so excited I can't wait when the end result is a “small” step away ... a bureaucratic step.
Although I have had a Colombian driver's license for more than 10 years, a theoretical and practical test is required in Germany, so: As soon as the project started, I started learning all 800 questions. After I passed it, I also took the practical test. And the Platónika got its approval from the TüV. Both she and I did an excellent job of the paperwork.
The Platónika have registered to replace their old, rusty PX frame, along with their performance improvements, but the license plate was still missing. And the day before my exam, it looked like this:
So my hope for a ride was gone.
However, Alex and the work team surprised me, they had taken care of the details to pick me up on the day of the exam.
Platónika's construction took almost a year. Every single step has been filmed, the pandemic and so on and so on has prolonged the process, but the long-awaited day has finally come.
6 Ready to roll Vespa bgm Platónika project by Scooter Center
But this story doesn't end here. The next will be to get to know the European scene. And I'll try out all the TOP components she got. A wide variety of adventures and tests are filmed and told here.
Let's hope that these strange times of social distancing will come to an end soon, and we can bring back the lost hugs, shared routes and contact with the asphalt, and we can live out that passion again.
https://blog.scooter-center.com/wp-content/uploads/2021/03/6-Kapitel.jpg9321440Maryzahttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngMaryza2021-03-17 16:53:112021-10-21 14:31:47CHAPTER 6 Project Platónika - Let's get started
All the adventures of completely rebuilding a Vespa PX (LML) are here by Maryzabel with everyone Secrets in photos and Videos tells.
Of course, Maryzabel uses the Scooter Center High-bay warehouse with over 40.000 parts and installed everything that Scooter Center especially with its brands bgm & MOTO NOSTRA has to offer. Are you curious about it?
1 The Wishlist - Project PLATÓNIKA Vespa px bgm 177
Here you will find a complete list of all the parts that a platonic love would need, each part individually or as a finished wishlist in the shop, loading in the shop takes a moment longer than usual because there are a lot of parts but patience is worth it.
https://blog.scooter-center.com/wp-content/uploads/2019/12/platonika-tetrischallenge_instagram.png12001200Maryzahttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngMaryza2021-03-17 08:29:252022-04-29 10:47:56Platónika all parts - the ultimate wishlist
Putting your feet on the ground is a statement in itself!
A confirmation of our identity; Scooter Boys & Girls, Mods, Racers and Travelers know that their ideologies and beliefs end up in accessories that become symbols of their very own qualities.
So do too Platonica this big step after having been in the air for months preparing for the existence of an ideal Vespa to finally touch the garage floor that has endowed her with symbols of safety, style and fun.
For her strong personality, Platonika has now received the latest bgm products, check out the video!
5 Down to earth Platónika Vespa PX bgm 177 by Scooter Center
Based on the competition chassis, but without a separate expansion tank and a fixed damping rate. Ideal for everyday sporting use, even with powerful engines.
Very harmonious basic set-up with an optimal balance between sportiness and suitability for everyday use. Compared to the Competition chassis, it is infinitely adjustable in height. This means that the height of the vehicle can be adjusted on both axles. In this way, the front can be lowered or the rear can be raised without having to change the pre-load, which is so important for the negative spring deflection. The front shock absorber can be continuously adjusted between a height of 240mm and 220mm.
stepless adjustment of the spring preload
sporty, harmonious damping technology
individually height adjustable (20mm)
Vespa tire set
The Complete set of tires -bgm Sport black matt tubeless bgm tire and bgm Vespa aluminum rim | bgm35010SLKB
BGM Pro Sport tires (3.50-10) fully assembled on aluminum sport rim BGM Pro tubeless (2.10-10) Ready-to-install tire set consisting of the first-class BGM Pro sports tire with a speed index S (approved up to 180km / h) and a load index of 59 (243kg per tire) as well as the exclusive BGM Pro light alloy wheel *.
TIRE
The specially coordinated material mix with a high silica compound ensures excellent grip in dry and wet conditions. The extremely stable carcass ensures perfect straight-line stability and excellent line accuracy when cornering quickly. Usually tires are simply pressed into shape from a layer of rubber. The bgm tires are significantly more complex to produce and consist of several layers in order to create the perfect tire that meets the highest requirements and has the highest speed rating on the market.
RIMS
The solid aluminum rim from BGM PRO made by FA.Italia saves around 600 grams compared to an original PX steel rim. In addition, there is a weight saving of around 370 grams due to the hose that is no longer required. The unsprung mass is thus reduced by almost one kilogram per axle. The responsiveness of the chassis improves noticeably.
SAFETY
With a double so-called "hump" in the rim bed, the tire is always safely guided in the rim. Similar to the latest runflat technology in the automotive sector, the air can slowly escape if a foreign object (nail or similar) is inserted without the tire slipping into the rim well. The vehicle comes to a controlled stop. The rim has recesses between the screw-on points. The cooling of the brake is improved.
Solid 4 piston Vespa brake caliper with radial attachment.
Two-part CNC milled housing made of high-strength aluminum, anodized.
With 4x25mm pistons, the caliper has 40% more piston area than a conventional two-piston caliper with 30mm pistons. The hydraulic transmission ratio is greatly improved and the braking force (with the same lever force) increased. Another advantage of the 4 piston technology is the symmetrical loading of the pads, which means that they are always fully in contact. A pad change is done quickly and easily with a stud bolt. A big advantage in racing. Central connection of the brake line.
You can find all Platónika episodes here: Vespa Platonic
Music in the video: Artist: Sunsearcher Title: Flamenco Rhythm Album: Sunsearcher Spirit License: CC-BY-SA
https://blog.scooter-center.com/wp-content/uploads/2020/12/5-kapitulo.jpg7441305Maryzahttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngMaryza2021-01-08 10:46:522021-10-21 14:31:24CHAPTER 5 Project Platónika - DOWN TO EARTH
When the technology is in place, it is time to tackle the visual down to the smallest detail. Details that let us recognize the Vespa, which is built entirely from new parts and will be one of the few who will not come from one of the factories.
All words are superfluous when we can look at the result of hours in the workshop in a good mood, because the assembly was almost as fun as it will be to drive it.
4 Perfection is in the details - Project Platónika Vespa PX bgm 177 by Scooter Center
https://blog.scooter-center.com/wp-content/uploads/2020/09/K4-YT2.jpg9321440Maryzahttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngMaryza2020-09-09 10:44:302021-10-21 14:31:13CHAPTER 4 / Project Platónika - Perfection is in the details
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.
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
The Vespa engine - the heart of Platonica - Has in the last post get the desired control angle of the crankshaft
Adjust cylinder overcurrent channels in the motor to optimize performance
Vespa Tuning: Before the complete assembly of the engine can be done, all the work that generates chips has to be done. Only then can the housing be cleaned.
In the next step, this includes the overcurrent channels of the cylinder in the motor.
The BGM177 is designed in such a way that the cylinder also works perfectly on the original overflow channels.
In our project, however, we use the opportunity to adapt the housing directly. Better filling of the cylinder always means one higher possible torque.
The easiest way to transfer the contour of the overcurrent ducts to the motor housing is to place the appropriate cylinder base seal on the housing and thus transfer the contour to the housing.
The contour in the motor housing is then adapted with a milling cutter. It is not necessary to mill the channel exactly as deep as in the original motor housing.
The BGM 177 cylinder is designed from the basic construction in such a way that the piston offers a sufficient cross-section.
The generated surface of the adapted channel can be milled and rough. No further polishing is necessary. As long as there are no rough corners and edges, a slightly roughened surface is perfect.
After the channels have been milled and the housing cleaned again, assembly continues ...
Scooter Center Tutorial Vespa PX - Modifying the transfers (activate subtitles)
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
Pensaría que después de pedir toda esta cantidad de piezas, vendría una larga espera, pero no fue el caso, gracias a la habitual ágil gestión en la bodega de SC, que para mi sorpresa y en el transcurso del mismo día tenía de repente toda una vespa en cajas, lista para ser armada. Pero… ¿qué it has cuando te llega ese paquete tan deseado?… ¡Claro! sacarlo todo.
It así como results con miles de piezas por todo piso y no nos quedó de otra que aceptar #tetrischallenge mira el video de lo que fue hacer este despiece en la vida real.
Exploded view Vespa px bgm 177 - Project Platónika by Scooter Center
In the last episode of Platónika we showed you what kind of parts has been selected.
Now it's time for some visual petting!
To my surprise and during the same day I suddenly had a whole scooter in boxes, ready to be assembled. A big thank you to the more than effective team in the warehouse here.
But ... what do you do when that desired package arrives? Exactly, unpack everything.
That is how it turns out with thousand of pieces all over the floor and we have no option but to accept the #tetrischallenge, see here the video of this exploded view in real life.
Exploded view Vespa px bgm 177 - Project Platónika by Scooter Center
The last episode of the Platónika project was about choosing the right components.
Now the parts are subjected to a very extensive visual inspection!
To my surprise, I got a huge box full of Vespa parts the same day I ordered. At this point, a big thank you to the tip-top logistics team for the ultra-fast compilation. And what do you usually do when you finally hold the long-awaited package in your hands? Exactly! Tear open immediately and take out all parts to examine them. Suddenly I found myself with thousands of pieces spread out on the floor and couldn't help but accept the #tetrischallenge. Check out the video and you will understand what it means to recreate an exploded view in real life.
Exploded view Vespa px bgm 177 - Project Platónika by Scooter Center
Would you like to know which parts are built into the Vespa Platónika?
1 The Wishlist - Project PLATÓNIKA Vespa px bgm 177
Only the best of the best, i.e. a multitude of specially developed products from the bgm brand. It would not have been easy for me to pick the best products, but luckily the technical department of the Scooter Centers actively supported here and created a never-ending list in painstaking detailed work in just a few hours.
I am a trainee at Scooter Center. I come from Colombia and take you on my big and small adventures in the blog, take a look behind the scenes with you Scooter Center and take you to scooter meetings.
Vespa Platonic
My way to the last Trainee-Phase gave me an in-depth look at the Technology department brought. I swapped my notebook for work gloves and instead of taking notes, I now make videos of what I have learned.
And as fate would have it, my dream of restoring a Vespa turned into a reality. We have the idea assembling a Vespa completely from scratch. We are so excited about the project that we decided to film the story of the construction with unboxing, reviews and tutorials.
This new Vespa test bike will have all the parts that probably every Vespa rider would like to have, so hopefully not just a Vespa, but a Platonic love will arise!
Here you can see our teaser to get a little taste of this project. So that you, just like me, be able to experience this wonderful experience up close.
TEASER - Vespa Project Platónika - Building a Vespa PX bgm 177
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.
https://blog.scooter-center.com/wp-content/uploads/2018/11/zylinder_bgm_pro_177_187_ccm_kolben_made_by_meteor_vespa_px125_px150_cosa125_cosa150_gtr125_ts125_sprint_veloce_vlb1t_0150001_bgm1770n_4_.jpg526700Heiko Lepkehttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngHeiko Lepke2018-11-26 12:52:092018-11-27 13:43:57Vespa 177ccm cylinder for Vespa PX available again: bgm PRO 177
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.
https://blog.scooter-center.com/wp-content/uploads/2018/11/zylinder_bgm_pro_177_187_ccm_kolben_made_by_meteor_vespa_px125_px150_cosa125_cosa150_gtr125_ts125_sprint_veloce_vlb1t_0150001_bgm1770n_4_.jpg526700Jenny Hasshttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngJenny Hass2018-11-26 12:52:092018-11-26 15:45:44Cilindro 177cc for the Vespa PX de nuevo available: bgm PRO 177
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.
https://blog.scooter-center.com/wp-content/uploads/2018/11/zylinder_bgm_pro_177_187_ccm_kolben_made_by_meteor_vespa_px125_px150_cosa125_cosa150_gtr125_ts125_sprint_veloce_vlb1t_0150001_bgm1770n_4_.jpg526700Jenny Hasshttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngJenny Hass2018-11-26 12:52:092018-11-27 13:47:07Cylindre 177cc for Vespa PX de nouveau available: bgm PRO 177
https://blog.scooter-center.com/wp-content/uploads/2018/11/zylinder_bgm_pro_177_187_ccm_kolben_made_by_meteor_vespa_px125_px150_cosa125_cosa150_gtr125_ts125_sprint_veloce_vlb1t_0150001_bgm1770n-1.jpg526700Jenny Hasshttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngJenny Hass2018-11-26 12:52:092018-11-27 13:44:44Cylinder 177cc for Vespa PX finally back in stock: bgm PRO 177
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.
https://blog.scooter-center.com/wp-content/uploads/2016/02/this-is-177.gif250970Heiko Lepkehttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngHeiko Lepke2016-10-12 15:26:032021-10-21 13:01:37bgm 177 cylinder for Vespa available again
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.
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.
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
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.
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.
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.
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.
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 ...
https://blog.scooter-center.com/wp-content/uploads/2016/03/bgm177-zylinder-entwicklung.jpg5321060alexhttps://blog.scooter-center.com/wp-content/uploads/2023/08/SC_BLOG-300x69.pngalex2016-04-01 07:35:522019-11-22 17:06:16BGM PRO 177 cc cylinder for Vespa PX125-150, Sprint150 Veloce - part 2
