The VR-One is for power purists, for those seeking to push their Vespa to the limit, but not only this.
It has the same assembly characteristics in the body as the V-One and the same possibilities of cylinder housing thanks to the revised fluid dynamics of the crank chamber, to the drilling of the studs and to the same accessories supplied with the V-One (except for the mixer pin).
This crankcase has been designed to withstand higher powers and is therefore supplied with main ball bearings on the flywheel side Ø25xØ52x15 and on the drive side Ø25xØ62x12, which remove the roller bearings and offer greater radial load tolerance capacity and an additional resistance to axial loads, not envisaged with the original roller bearings. Dedicated seals are also supplied.
The greater resistance to stress due to the crank drive means the crankcase is perfect to be assembled with our single-ring MHR cylinders, item 3116349 (57 stroke), but above all with the 3116351 kit (60 stroke). The natural combination for this configuration is with the Malossi engine shaft with full shoulders, 60 stroke, item 5316176, supplied with correct balancing and perfect for reed valve supply envisaged for the new VR-One.
**If you are using a P200 transmission in these cases, you have to use the PX layshaft because the cases are based off of a PX case design**
