Yamaha FJR1300 Oil Capacity: How Much Oil the Engine Takes

The short answer
For a routine oil change on the Yamaha FJR1300, Yamaha owner's manuals commonly list about 3.8 litres (roughly 4.0 US quarts) when the filter is not replaced, and about 4.0 litres (roughly 4.2 US quarts) when the oil filter cartridge is replaced. These are refill amounts for a normal drain. They are not the total capacity of a completely dry engine.
Service situation | Commonly listed quantity; Oil change, filter not replaced | About 3.8 L (about 4.0 US qt); Oil change with new filter cartridge | About 4.0 L (about 4.2 US qt); Dry engine after a rebuild | Higher than a routine change; see the service manual for your model year
What changes the answer
Yamaha has built the FJR1300 across several generations since the early 2000s, including the shaft-drive sport-touring model and later variants such as the semi-automatic AE and the electronically adjusted ES. The figures above are the ones most widely published for the model. No model-year-specific source document was supplied for this article, so it cannot confirm that every year, variant or market uses identical quantities. Check the owner's manual for your exact bike before relying on these numbers.
Three practical factors also affect how much oil goes in on the day:
How long the engine drained, and whether it was warm, determines how much old oil stays inside. Whether you replaced the filter cartridge. A new filter holds some oil, which is why the with-filter figure is higher. Whether the engine was fully dry after a teardown. A dry engine needs a larger total quantity than any routine change.
Use the level check, not just the number
Treat the published quantity as a starting point. Pour in slightly less than the listed amount, run the engine briefly, switch it off and give the oil a few minutes to settle. Then check the level with the motorcycle held upright, not leaning on its side stand, and top up gradually until the level sits between the minimum and maximum marks. Follow the exact checking procedure in your owner's manual, because it specifies the bike position and timing for your model.
Oil type
Getting the quantity right is only part of the job. The FJR1300 uses a wet clutch that runs in engine oil, so motorcycle oils meeting the JASO MA standard are the usual choice. Oils labelled energy-conserving or friction-modified for cars can affect clutch engagement. This article does not set out the recommended viscosity grades or API service class for each model year. Take those from the owner's manual for your specific FJR1300.
Gaps to verify
Exact refill quantities for each individual model year, variant and market. Total dry-engine capacity, which is listed in the factory service manual. Recommended viscosity grades and oil specification for your bike.