1. In the frame
Once the idea a motorcycle frame didn’t have to be brazed together from cast iron lugs and massive steel tube caught on, all sorts of developments came along. Naturally the competition world was the driving force in experimentation and, in the struggle to make a four-stroke bike lighter, manufacturers soon realised those frame tubes not only formed a structure to put the engine in but could carry the oil too. So, pictured is the latest Otter type of frame from Faber
