Holding it together
The main frame is a polished, hand built aluminium twin-tube shotgun chassis on the SS, and a cast frame and swingarm on the RR. The engine acts as a stressed member, and features an adjustable headstock angle, and swingarm pivot. The frame is actually 3kg lighter than the SG5 race bike’s. The RR also gets a cast swingarm and cast outriggers, but the weight difference is minimal according to design chief Simon Skinner (see right). The frame takes around 26 hours to polish, by hand.