Genuine Suzuki for the clutch – originals are generally tougher and nicer to use than aftermarket. New frictions and steels performed faultlessly – we’ve not had to adjust it since. Rules don’t permit narrower race chains. Bike HPS had an array of Talon sprockets in stock – standard ratios, plus a -1 option at the front, -1, -2 and -3 at the rear. We used just two rears – only the constant high-speed nature of Thruxton demanded a taller nature than the first ratios we settled on.