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Vespa exhaust BGM BigBox Sport on dynamometer

Michael Holden from England is a loyal customer of Scooter Center. On his way to his run “holidays in Sauerland” he paid us a short visit and leapt the chance to test the Vespa exhaust BigBox Sport on the dynamometer.

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Vespa PX 200 with Malossi 210 and PHBH30 carburetor

His Vespa is a German Vespa PX200, which he bought when he was deployed in Germany with the British Forces.

The engine is a simple one and is made up of an “old” Malossi 210 cylinder, DellOrto carburetor PHBH 30, Mazzucchelli racing shaft with 57mm stroke and a Taffspeed MK4.

Michael tells us, that the engine was tested with the same parts in England on a Dynojet before he left. The result was 17.88BHP (Brake Horse Power). Giving us a value to compare with, when measuring and to assess whether the engine’s performance went down. The old 210 with the MK4 demonstrated the predicted performance. The difference in values from the Dynojet and from our dynamometer is only a few tenths. So you can see, the two results are comparable.

M. Holden Malossi 210 PHBH30  MK4

The 90s: Taffspeed MK4 Vespa exhaust

At the time (1996 the first systems with TÜV-certificate have been sold in Germany) the MK4 was a good all-rounder with positive performance. A positive performance was reached before having to respond. Overall you can say that an engine is regarded as one that “drives well” on the street, when it reaches at least 10HP from 5000 revs/min and when performance and torque increase with increasing revs. However, the MK4 is an exhaust with just below 18Nm at about 6000 revs/min and therefore forces the driver to change down to a lower gear when being in 4th gear below 90km/h and higher acceleration is demanded.

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The modern racing exhaust: BGM PRO BigBox Sport

When the MK4 was modern, no-one would have thought, that exhausts, which look like lunchboxes, would ever reach such a performance.

For a while now, more powerful exhausts are being developed with looks that resemble the original.

Leading to the BigBox:

Combining the performance of an expansion exhaust chamber with the looks of an original exhaust.BGM Tuning

BGM1011SP

BigBox Sport vs. Taffspeed MK4

A comparison of BigBox Sport and Taffspeed MK4.

bbs mk4

In contrast to the MK4, the BigBox Sport can add further torque and performance from 4500 revs/min. Comparing the engines on the street, let the scooter seem to drive more easily, because there is more torque for acceleration. The additional torque becomes crucial when the scooter is driven at at least 5500 revs/min on a motorway or highway.

Michael was convinced of the BigBox Sport. He wouldn’t even let us detach the test-exhaust and continued his trip to the Sauerland with a fitted BigBox Sport.05_2015 019

Test the new Vespa exhaust now:

Would you like to know, what happens if we fit the Bigbox Sport to your engine? Send us a date inquiry:

pruefstand@scooter-center.com
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 our 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

BGM BigBox Sport was just launched onto the market and was already sold out

We were really astonished: within a very short period of time the new Vespa racing exhaust (BGM1010SP) was already sold out. Due to positive feedback and tests, which have been conducted by several instances, it should have been clear. We are delighted about the immense success of this exhaust – Thank you very much!

BGM BigBox Sport – a wolf in sheep’s clothing
Performance just like a racing exhaust – looks & sound just like a standard exhaust

Update: exhaust for PX200 and Rally 200 also available again!

Now available again!

Order your BigBox Sport here
Exhaust bgm bigbox sport vespa bigbox-sport-vespa-auspuff_3
BGM BigBox Sport is a thoroughbred racing exhaust, which gives a standard looking exhaust, that won’t arouse suspicion. It definitely is an alternative to conspicuous and mainly loud and big expansion exhaust chambers. Its willingness to deliver maximum performance makes it clearly stand out from other box pipes. Designed for performance oriented drivers, who hold an unsuspicious vehicle in high esteem.

bgm BigBox Sport performance chart:

LML150 5 port reed valve engine (reed valve intake) with Quattrini M1X cylinder (undealt) and 1.5mm head spacer (stroke compensation), SI24 carburetor Performance chart (BGM1010SP)

Need of a high performance engine concept

Just like any good racing exhaust, the sport box needs a high performance engine concept in order to develop full performance. Surrounded by cylinders like the Quattrini M1X and similar, the sport box offers impressing results. It easily supports engine performances above the 25 HP level and pushes with a rich torque. Despite its high top performance the sport box also supports leisure cruising.

Due to the commitment to a high gas flow rate, BigBox Sport is not suitable for standard engines or tame tuning cylinders. It needs a clear and strong pressure impulse in order to breathe life into the big manifold of the Sport Box.

PROS:

  • Standard looks
  • Low noise level
  • Top performance like an expansion exhaust
  • No performance slump
  • Broad revs range
  • Higher top speed
  • Very unsuspicious
  • Also fits a Rally/Sprint without modifications
  • Solid design with clamp screw at the cylinder
  • Handmade in Europe

CONS:

  • Not suitable for vehicles with 8 inch wheels (no sufficient ground clearance)
  • Not suitable for standard engines

To fasten the manifold at the cylinder you need a clamp screw. Compared to loose fastening with an O-ring sealing this results in best stability and prevents damage of the exhaust flange. For best ground clearance you should use a long spacer at the rear shock absorber.

Conclusion: pure understatement. Performance of a racing exhaust, looks and sound like a standard exhaust.

Order your BigBox Sport here