Spagthorpe Research
C-Twin Engine

Spagthorpe Motorcycles

Modern Era

BNG Era

Classic Era

Undated Era


People

Racing

Maintenance

Company

Research

Events

Organizations

Links

Described in the archives as two concentric cylinders of equal mass and displacement. The outer cylinder had dual connecting rods, and inner rings that were a bitch to change.
Spagthorpe Home