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Lambretta exhaust test Big Box Reso racing exhaust

Lambretta expansion chamber and big box Clubman prototype test

Lambretta exhaust test, while the new and upcoming Lambretta Big Box is currently in production. Unfortunately, a delivery date is still unknown. Exhaust test on the Scooter Center Performance test bench

Lambretta exhausts on the dyno

Before we send the final sample to Spain, we put the new box through its paces. Additionally we have another prototype box from our friend Chalky from Replay Scooters and JPP on the dyno:

  • bgm PRO BigBox Proto
  • JPP box prototype

The following expansion chambers compete against the boxes:

  • the TSR Evo,
  • the JL3 and
  • in MB3

And all three reso systems did better against the boxes than we would have expected! The Lambretta exhaust systems

The Lambretta engine

The test engine was constructed as follows:

Results & conclusion of the test

Nice and clear to see how well the box scores right from the start not only with but also with plenty of torque compared to the 'racing exhausts'.

 

That's what makes the bgm PRO boxes so nice to drive. There is always enough power available without having to struggle with gear connection problems or having to twist the throttle like crazy to get things moving. The moderate consumption values ​​of the engine concepts with the bgm boxes are another advantage, apart from the original appearance and pleasant sound level. Another outstanding feature is the registered design of the mounting system with adjustment options in both horizontal and vertical directions. This allows tolerances and, above all, spacers used for different strokes and connecting rod lengths to be compensated for.

Lambretta exhaust test performance diagrams

Here you can find the performance diagrams as PDF:

Exhaust Vespa PK 50 bgm PRO BigBox TOURING

NEW: Exhaust bgm PRO BigBox TOURING for Vespa PK50 & PK125

Quite secretly a new one racing exhaust for Vespa PK has crept into our shop. Today we present the new Vespa PK exhaust from bgm PRO.

Vespa PK racing exhaust - bgm PRO BigBox Vespa PK | HANDMADE in EUROPE

We have two versions:

  1. for Vespa PK50 & PK80 | BGM1050PK
    Exhaust -BGM PRO BigBox TOURING PK- Vespa PK50, PK80 (S / XL / XL2 / HP / SS / Lusso)
  2. for Vespa PK125 & PK75 | BGM1125PK
    Exhaust -BGM PRO BigBox TOURING PK- Vespa PK125 (S / XL / XL2 / ETS), Motovespa PK75 (S / XL / Junior)

The history of this exhaust system lies in the fact that there were no original Piaggio exhaust systems for the PK 50 models. During the development of a new exhaust we recognized the potential and were able to develop a sport exhaust with Original optics, low noise level and a significant increase in performance. The bgm PRO quality exhaust is now handmade in Europe Y es immediately available: bgm PRO BigBox TOURING Vespa PK

bgm PRO BigBox Touring VS Sito PLUS

On the dynamometer it looks like this:

Vespa PK racing exhaust dynamometer

 

bgm PRO BigBox for your Vespa PK

Vespa PK exhaust with more power, discreet look & low noise

The bgm PRO exhaust in the TOURING version thus provides the discreet look and acoustics of an original Vespa exhaust, combined with a sports exhaust characteristic with high torque and wide power band. This system was originally designed as a replacement for the original Piaggio exhaust systems, which are no longer available. In the meantime we have developed it to a full fledged, Modern sports exhaust system.

We attached great importance to a good performance with a Discreet noise level as well as a good fit.

  • Significantly more power
  • Quiet racing exhaust
  • good fit
  • Original optics
  • High and early torque
  • Wide speed range
  • More final speed
  • Very unobtrusive
  • Fits without modifications
  • Handmade in Europe

The bgm PRO Sport TOURING harmonizes very well with a standard engine as well as with the classic tuning cylinders like the

  • Polini 75-112,
  • DR75-102 or
  • Malossi 75-112
  • Polini 133

Exhaust Vespa PK 50 bgm PRO BigBox TOURING

Easy mounting

The relatively far down split manifold allows a quick disassembly of the exhaust body without having to loosen the manifold on the cylinder. The connection is secured by tension springs in a stable but quickly detachable way.

For safety reasons we recommend to start with 2-4 numbers more than a standard exhaust.

SCOPE OF DELIVERY

  • exhaust body
  • exhaust manifold
  • Exhaust Springs
  • Cylinder / manifold gasket

Vespa PK Exhaust TIP:

  1. Adjust spraying, see above.
  2. Some heat-resistant sealing compound ( accessories for the exhaust) between manifold and exhaust body keeps this area permanently clean.

Exhaust PK 50: Matching Vespa PK

The PK exhaust fits the following Vespa PK 50 and Vespa PK 80 models:

Exhaust PK 125: Matching Vespa PK

The PK exhaust fits the following Vespa PK 125 and Vespa PK 75 models:

Order here: modern Vespa PK exhaust

New Vespa touring exhaust

We received the first production patterns of the BigBox Touring for 200cc Vespa PX engines today.

Assessing looks and fit are part of a normal sample exam. And so are test runs on ours Scooter Center P4 dynamometer.

We already mentioned in previous entries relating to this Vespa exhaust, that the BigBox Touring has a dramatically smaller U-bend than that Big Box Sports, his larger sister.

BigBox P200_2

the missing black, heat-resistant cover layer makes the BigBox Touring look somewhat naked. We also attach significance to closely assessing all the joints without the cover layer, though.

BigBox P200_3

Test assembly on a Vespa Sprint with a 200cc engine

One of the first parts of the exam was the assembly in a Vespa VLB (Sprint). Usually space issues arise when fitted in combination with a 200cc PX engine. Especially around the center stand, in particular in the “U's” and the laps for the stand springs. Depending on the assembly of the exhaust, stand feed rubbers might collide with the U-bend.

We especially focused on these narrow spaces to see whether everything fits. The BigBox fits even to vehicles with a two-spring system at the center stand, which has only been introduced to the German market. The stand feed rubbers have a save distance to the hot U-bend.

BigBox P200_4

Just like his bigger sister Big Box Touring comes with a solid clamp and additional holders for exhaust springs.

You want to play it safe? our retaining plate including exhaust springs perfectly matches your BigBox.

BGM101HMSR (1)

Performance measurement Vespa exhaust

Once we agree with the looks, processing and fitting we continue with performance measurements.

First “testing victim” is a cast iron Polini with 207cc, SI24 carburetor in a standard Vespa PX200 engine.

big box touring 200

Early torque for day to day use and touring

When developing the BigBox Touring we focused on having the possible torque available early and that there is a high amount of pressure in the exhaust with low revs.

The earlier and more homogeneous torque is provided by the engine, the nicer is a day to day drive. Our cast iron test engine by Polini with a BigBox touring reaches more than 18 Nm at 3900 rpm. Translated to the 4th gear this means smooth cruising at 50km / h with a very good potential to accelerate up to the final revs.

Increased transmission possible

Depending on the engine you fit the BigBox Touring on, an increased primary transmission can be used reasonably to go easy on revs while retaining the same cruising speed. Increasing transmission is easiest when using a clutch sprocket. the BGM clutch sprocket for Cosa clutches or a sustainable solution like ours BGM Superstrong clutch are very fitting examples. An increased transmission may increase the top speed by 5km / h at the same revs.

BGM8099D

Let's test - BigBox Touring is waiting for you!

You want to know what the Vespa Touring exhaust BGM PRO BigBox Touring can do to your personal engine? just send us a date inquiry to

pruefstand@scooter-center.com

Our test pattern is waiting for you on our dynamometer.

bgm PRO BigBox Vespa 200 bgm1011sp

Since yesterday, the BigBox Sport for Vespa PX 200 is also available again

Shelves were quickly empty, due to the immense success and demand of ours Vespa racing exhaust. But we stocked up and since yesterday the BGM PRO BigBox Sport exhaust is available again for Vespa PX200 and Vespa PX 80 - 150. bgm PRO BigBox Vespa 200 bgm1011sp

Order your Vespa racing exhaust here

vespa exhaust systems bigbox bgm

BigBox for Vespa PX125 and Vespa T5 available again

BigBox for Vespa PX125 and Vespa T5 available again

The long-awaited exhaust Vespa bgm PRO BigBox are for Vespa PX80, PX125, PX150 (BGM1010) and for Vespa T5 (BGM1012) available again.

long-awaited exhaust Vespa bgm PRO BigBox

After a final quality check THE tuning exhaust for Vespa where carefully packaged in the bgm PRO boxes and prepared for the world further shipping.

THE tuning exhaust for Vespa

Order your Vespa bgm tuning exhaust here:

Exhaust bgm PRO BigBox Vespa PX80, PX125, PX150 Item number: BGM1010

Exhaust bgm PRO BigBox Vespa T5 125cc (VNX5T) item number: BGM1012