
R1100GS
First oilhead GS
1085cc air/oil-cooled boxer
- R1100GS — final-drive splines wear — all years
- Carb sync drift on the Boxer — all years
- Reg/rec failure — all years
The original heavyweight ADV. Four boxer-twin GSes across 30 years, in unbroken evolution. The R1200GS LC bridged 2013-2018 between the Hexhead and the ShiftCam-equipped 1250 — we've picked the 1250 for the third column as the more significant generation.

First oilhead GS
1085cc air/oil-cooled boxer

1170cc Hexhead boxer
Lighter, more powerful

1254cc ShiftCam boxer
Variable valve timing arrives

All-new 1300cc boxer
BMW's lightest big GS in years
Every figure on this page is from a published manufacturer spec sheet or a reputable review publication. No press junkets, no opinions in the spec data. Inflation calculated using Bank of England's CPI tool.