BMW Genuine Timing Valve Train Chain Camshaft Piston Left R1100GS R1100R R850 R1100RS R1100S R1100RT R1200C R1200 Montauk R1200C Independent R1200GS R1200GS Adventure HP2 Enduro HP2 Megamoto R1200RT R900RT R1200R R1200ST R1200S R1200CL R1150GS R1150 Adventure R1150RS R1150RT R1150R R1150R Rockster