There aren't R spec camshafts, the '08 SD and SDR part numbers are the same. The '08 R model uses 3mm larger intake valves, 0.7 higher compression pistons, larger throttle bodies (RC8?), 55mm Akrapovic header, different spark plugs, and a lightened crankshaft to gain the exrta 12 hp / 1.5 ft lbs at 1,000 rpm higher on both specs.
Basically the only power upgrade allowed on the Super Duke Battle series bikes is Akrapovic cans and Akra's EFI map.
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