Lambretta exhaust archive - Scooter Center Scooterswhoops blog

While news for the more modern scooters is currently being presented at the EICMA, last weekend at the Mostra Scambio (November 3rd - 5th, 2023) there was long-awaited news for many Lambretta friends.

The lui 75 is by far the most complex Lambretta exhaust to produce, but also by far the one that works best on the lui models. (Resonance systems are left out.)

Lambretta lui exhaust – the structure:

And here again in a beautiful drawing from the classic:

In addition to the complicated interior, there are two heat shields screwed onto the outside and a chrome finish on the exhaust itself. An effort that is second to none and really makes reproduction a challenge.

Our surprise in Novegro was all the greater that two Italian manufacturers presented the exhaust as a reproduction.

The structure looks plausible:

We have ordered the systems and as soon as they have received their chrome bath, they will come to us and will be available in the shop.

Just like the heat protection grilles:

The competing product from Tutto Lambretta was available for purchase and our exhaust is currently still in Dortmund. (Thanks Corina & Marco for the transport.)

As soon as the others are here, it will be put to the test.

A big thank you also to Dottore Markus for his translation skills in Novegro!!!

Stay tuned!

Lambretta resonance exhaust and Big Box prototype test

A Lambretta exhaust test: the new and upcoming Lambretta Big Box is currently in production. A delivery date is unfortunately still unknown.

The Lambretta exhaust systems in the test

Before we sent the final sample to Spain, the new box was put through its paces again. Lambretta exhaust test: Another prototype box from our friend Chalky from Replay Scooters and JPP came directly to the test bench:

bgm PRO BigBox Proto
JPP box prototype

The following resonance racing exhaust systems competed against the pits:

the TSR Evo,
the JL3 and
in MB3

And all three Reso systems did better against the speakers than we would have expected!

The Lambretta engine

The test engine was constructed as follows:

Cylinder: Converted to membrane RT225 cylinder (BGM2225NR)
Crankshaft: bgm PRO 110/60 (BGM11060N)
Ignition: bgm PRO electronic AC ignition (BGM210900KT)
Carburetor: Dellorto PHBH 30
Intake manifold: MBD with 6-valve membrane (7672617KT)
Clutch: bgm PRO 6-disc clutch (BGM8011NR46)

Result & conclusion of the test

Nice and clear to see how good the box is from the start Performancebut also with plenty of torque scores in comparison to the 'racing exhaust systems'.

This is exactly 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 turn the gas like crazy to get things going.

The moderate consumption values of the engine concepts with the bgm boxes are another advantage, apart from the original look and the pleasant background noise. Another outstanding feature is the protected fastening system with adjustment options in both horizontal and vertical directions. This allows tolerances and, above all, spacers used to be compensated for different strokes and connecting rod lengths.