No—the Yamaha YZF-R3's engine displacement is 321cc, not 300cc. It is commonly discussed alongside 300cc-class bikes for licensing and performance purposes, but its official displacement is 321cc.
Background and engine size
The YZF-R3 uses a 321cc parallel-twin engine. While many riders and media refer to it as a member of the 300cc class, the exact figure is 321cc. This distinction matters for some licensing schemes, insurance calculations, and market labeling. The engine is liquid-cooled with dual overhead cams and four valves per cylinder, paired with a six-speed transmission to deliver approachable power in a lightweight sport package.
What displacement means in practice
Displacement is a primary measure of engine size, but marketing and regulatory classifications can blur the lines. In regions with a 300cc class, bikes like the R3 are often positioned alongside 300cc machines due to their handling, weight, and rider experience—even though the official displacement is 321cc.
Key specifications
Below are the core specs that define the R3's size, power, and performance as of the latest model years.
- Displacement: 321 cc
- Power: about 42 hp (roughly 31 kW) at around 10,750 rpm
- Torque: around 29 Nm at around 9,000 rpm
- Wet weight: approximately 169 kg (about 373 lb), depending on year and market
- Transmission: 6-speed
In summary, the YZF-R3 operates in a 321cc category, delivering performance typical of 300cc-class sport bikes while carrying its own official displacement figure and tuning characteristics.
Marketing naming vs actual displacement
Some markets and consumer guides categorize the R3 within the 300cc class for licensing, insurance, and comparison purposes. This marketing alignment helps buyers gauge performance relative to peers, even though the engine is officially 321cc. The distinction matters for technical specifications, pricing in certain markets, and regulatory considerations such as licensing limits.
Class labeling vs official displacement
Displacement is the formal specification, but class labels are often driven by regional rules and marketing decisions. The R3’s 321cc size places it near the top end of the traditional 300cc class, which is why you’ll see it discussed in both contexts.
Summary
The Yamaha YZF-R3 is not a true 300cc motorcycle; it is a 321cc parallel-twin. It is commonly grouped with 300cc-class bikes for marketing and rider expectations, but the exact displacement remains 321cc. Prospective buyers should consider both the official spec and the practical performance when comparing to other bikes in the same size and power range.