Oil and filter change
≈ 10,000 km or 1 year
JASO MA or MA2 approved four-stroke motorcycle oil (JASO MB on scooters): an “energy conserving” car oil makes the wet clutch slip. Change it more often in city use or on track.
Source [1]F 650 GS (bicylindre) · 2008–2012
BMW F 650 GS (bicylindre) 798 · 71 hp (2008 to 2012)
The BMW F 650 GS (bicylindre) 798 uses the BMW 798 petrol engine with 71 hp.
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Technical specifications
- Fuel
- Petrol
- Power
- 71 PS / 52 kW
- Displacement
- 798 cm³
- Cylinders
- 2
- Engine code
- BMW 798
- Period covered
- 2008–2012
- Documented market
- Europe
Transmission
- Manual · 6 speeds
Figures apply to the cited configuration and market; equipment and transmissions may vary by production date.
Specification source : [1] AutoKarnet
This version
71 hp (52 kW), chain final drive, 6-speed manual. Built from 2008 to 2012.
AutoKarnet advice
In the range
It is the only petrol version of this generation. The BMW 798 engine is also fitted to: BMW F 800 GS (F 800 GS), BMW F 700 GS (F 700 GS), BMW F 800 R (F 800 R).
AutoKarnet advice
Body style and inspection points
On a motorcycle, tyres, final drive and brakes matter as much as the oil change. Check the tyre manufacturing date, steering-head play and fork-tube seals; an oil film on a tube means a fork seal needs replacing. A notched steering bearing can be felt when braking at low speed.
AutoKarnet advice
Comparing generations
Other documented generations of this model: • F 650 GS (monocylindre) (2000–2007) : adventure bike, 50–50 hp. A first registration near a generation change does not identify the car on its own: check the body style and powertrain before using a service schedule.
AutoKarnet advice
Maintenance and records
≈: estimated reference — the vehicle’s service indicator prevails.
Brake fluid
Every 2 years
Replace the fluid in both circuits (and the hydraulic clutch if fitted), whatever the mileage; dark fluid has absorbed moisture.
Source [1]Fork oil
≈ 30,000 km
Fork oil change and seal check; an oil film on the tubes means a seal needs replacing before it contaminates the brake caliper.
Source [1]Chain kit (chain and sprockets)
≈ 25,000 km
Lubricate and check the tension every 500 to 1,000 km and after rain; replace chain and sprockets together when the chain no longer holds its tension or the teeth are hooked.
Source [1]Spark plugs
Every 20,000 km
Replace the full set; worn plugs raise consumption and cause misfires.
Source [1]Air filter
Every 40,000 km
Replace more often in dusty conditions.
Source [1]Valve clearance
Every 20,000 km
Check and adjust if needed, often together with the plugs; too little clearance burns the valves, too much makes the engine noisy.
Source [1]Coolant
Every 3 years
Replace the coolant and check the hoses and radiator; check the level cold between services.
Source [1]Questions about this version (3)
Which engine is in the BMW F 650 GS (bicylindre) 798?
The BMW 798 petrol engine (798 cc), 71 hp (52 kW).
AutoKarnet advice
Which oil for the BMW F 650 GS 798?
A JASO MA2 10W-40 four-stroke motorcycle oil suited to the BMW 798 engine.
AutoKarnet advice
How do I check this page matches my car?
This page covers BMW F 650 GS (bicylindre) 798 71 hp, adventure bike, 2008–2012, with 71 hp (52 kW), BMW 798, 798 cm³, 6-speed manual, 2008–2012. Compare these details with the registration document and gearbox identification. The designation BMW 798 may cover several revisions: a VIN is still needed to confirm part numbers.
AutoKarnet advice
Documentary sources
- [1] Rédaction AutoKarnet
AutoKarnet · FR · Europe · Synthèse éditoriale AutoKarnet · Accessed 09/10/2026