Table 1 BMW F650 GS engine specifications.

From: 1D hydrogen engine modeling to investigate air-fuel ratio, spark timing, and water injection effects on performance and emissions

Specification

Value

Engine type

Single-cylinder, 4-stroke

Displacement

652 cc

Cooling system

Liquid-cooled

Bore × Stroke

100 mm × 83 mm

Compression ratio

11.5:1

Maximum power

50 HP (37 kW) @ 6500 rpm

Maximum torque

60 Nm @ 5000 rpm

Starter system

Electric starter

Transmission

5-speed manual

Lubrication

Dry sump, with oil pump

Valve configuration

DOHC, 4 valves

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