What Gas Does a Yamaha FZ-07 Take?
The short answer
The Yamaha FZ-07 runs on unleaded gasoline. Leaded fuel is not an option for any modern street motorcycle, and it is not legally sold for road vehicles in the US. The exact minimum octane rating for your bike is set by Yamaha. This guide does not give that figure, because no confirmed specification was available while it was written.
The authoritative sources are the owner's manual for your model year and the fuel label near the tank filler, if your bike has one. Both state the minimum octane Yamaha requires. Follow that figure rather than a forum post or a general rule of thumb.
Which bike this covers
In the US, Yamaha sold this parallel-twin naked bike as the FZ-07. It later adopted the MT-07 name, which the bike already used in other markets. Fuel requirements can differ by model year, emissions specification and market. If you own an FZ-07, check the manual for your specific year. Don't assume a figure published for an MT-07 from another market or a later revision applies to your bike.
What the octane number means
An octane rating measures how well gasoline resists knock. Knock, also called detonation, happens when part of the fuel-air mixture ignites on its own from heat and pressure instead of burning smoothly from the spark plug. It produces pressure spikes that can damage pistons and other engine parts over time.
Higher-octane fuel resists knock better. It does not contain more energy and does not make an engine more powerful in itself. An engine designed for a given minimum octane gets no meaningful benefit from a higher grade. Fuel below the minimum can let knock occur, especially under heavy load, in hot weather or at low engine speeds with wide throttle openings.
Reading octane numbers at a US pump
US pumps show the Anti-Knock Index (AKI), labeled as (R+M)/2. It averages two laboratory measurements: the Research Octane Number (RON) and the Motor Octane Number (MON). Many other markets display RON alone, and RON figures are typically higher than AKI figures for the same fuel.
This matters when you read your manual. Motorcycle manuals sometimes list both scales, or only RON if the document was written for a non-US market. Before choosing a pump grade, confirm which scale your manual uses. Comparing a RON figure directly with a US pump number could lead you to buy a higher grade than you need.
Ethanol blends
Most regular gasoline sold in the US contains up to 10 percent ethanol, marketed as E10. Your owner's manual will say whether ethanol-blended fuel is acceptable for your FZ-07 and set a maximum ethanol content.
Some stations also sell higher blends, such as E15 or E85. In the US, E15 is approved for certain cars and light trucks, but motorcycles are not part of that approval, and pumps carry warning labels saying so. E85 is intended only for flex-fuel vehicles. Do not put either blend in an FZ-07 unless Yamaha's documentation for your bike explicitly allows it.
Practical fueling guidance
Use unleaded gasoline that meets or exceeds the minimum octane in your owner's manual, and check whether that figure is AKI or RON. Stay within the ethanol limit Yamaha specifies, and avoid pumps labeled E15 or E85 unless your manual permits them. Paying for a higher grade than the manual requires does not improve performance or fuel economy in an engine designed for the lower grade. If you hear pinging or rattling from the engine under load, the fuel may be below the required octane. If it persists after you switch to fuel that meets the specification, have a qualified technician inspect the bike. For storage longer than a few weeks, follow the manual's guidance on fuel stabilizer and tank level, because gasoline, especially ethanol blends, degrades over time.
What this guide could not confirm
This guide gives no specific octane number, ethanol limit or fuel-tank capacity for the FZ-07, because no verified Yamaha specification was available. Get those figures from the owner's manual for your model year or from a Yamaha dealer with your bike's details.