The new 250cc partial streamlining record is 121 mph which is not achievable with a standard Vespa (like the original dry lake racer

1. fit me (bigger than the original rider)
2. fit the Vespa engine we have
3. fit the DLRA Rules for Vespa Streamliners

Below is an adapted Siluro to suit DLRA rules and a different Vespa engine. The rider kneels over a centre engine, which chain drives the rear wheel (to get higher gearing possibilities). This drawing is roughly to scale and it needs to be higher to fully protect the rider. The image at the top is the likely final design, it is the same format but stretched longer to keep proportions.