MB & bgm Vespa Big Box exhaust - update

Vespa exhaust bgm PRO

Our exhaust manufacturer has delivered the first samples made after the sample developed by Mark Broadhurst. We received samples for the P2 as well as for the 125 and 150 P-range engines.

First sight: Well done! Optics and machining as desired. Thick, solid made, shape of the U-bend spot on and the measurements of the exhaust bushing is right too.

If it proofs itself at the dyno, the manufacturer could start. A delivery date within this year could easily be done.

For testing we had these engines:

• Polini 207
• Polini 210 Torque Tune
• 12 hp original P2 engine
• Malossi 166
• Polini 177 (of a customer of us)

All dyno runs were done on proper warmed up engines. The comparison is against the exhausts already fitted to each scooter and against SIP Road exhaust.

Nearly all scooters were used on the road afterwards to see the changes done to the power characteristics in the real world too. And all the riders were happy how the engines transformed and were much faster and easier to ride.

upshot: Production can be started!