I'm upgrading a spare R engine to SL spec' from the dealers parts book the performance parts are:- Intake Cams $734.00 ea Exhaust Valves $311.00 ea Pistons $1041.00 ea Head Gaskets $146.00 ea Crank Clutch, basket - hub - friction / drive plates $1568.00 same as WSB 1199RS Exh' cams & Int' valves are same as the R, crankshaft is not available but can be replicated from R crank, Ben Fox, Bursi, etc
Vaguely interesting, but hardly relevant to the real world except as Count says it shows what good fun and value bikes are.