Contrary to industry convention, each model's "number" does not refer to the engine capacity. Instead, each bike in the F-series range uses essentially the same engine, but with different power outputs and equipment levels. The parallel-twin engine was first used in the
F800S, and is also used in the
F800GT,
F800R and
F800ST, although these bikes are tuned to deliver peak power at a different RPM from the GS models. The GS models have longer suspension travel, needed for offroad use. The F650GS name causes further confusion as it was previously used for a BMW bike fitted with a single-cylinder
Rotax engine. It was produced from 2000 to 2007, then relaunched in 2009 as the
G650GS, fitted with a Chinese-assembled engine of the same 652 cc capacity. All bike variants use the same basic engine. The F800 produces , which is more power than the F700 and more than the discontinued F650. Engines on both the F800 and F700 can be modified to deliver a reduced power output of for European riders on restricted Category A2 licences. The F800 and F700 are fitted with twin
brake discs on the front while the F650 was fitted with one disc. Both bikes had
anti-lock brakes (ABS), which were optional on the F800 before 2013 models and all years of the F650. Previously, only the F650 had the option of lowered suspension, which was not available on F800 models up to 2012. From 2013, both the F800 and F700 can be specified with a low seat and/or lowered suspension, the combination of which reduces seat height to (F800) or (F700), and makes the bikes suitable for shorter riders. ==Special editions==