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Rolls V8 Motorcycles

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Rolls V8 Motorcycles uses a Rover V8 in a TIG welded custom frame with a Suzuki front end, there are bikes in both longitudinal and transverse configurations

The bikes are single speed and use an electric/hydraulic clutch setup but it looks like he is working on a 2 speed. 

Rolls V8 Motorcycles  also offers a primary drive for Rover V8s in the transverse configuration in case you want to roll your own.


Source   Rolls V8 Motorcycles