Airtime 51 Tooth Rear Sprocket Steel/Aluminum with Blue Inner Ring for Fantic XX/XE 125 2021 & Yamaha YZ/YZ F 125/250/450 1999+

The Airtime 51-tooth rear sprocket is the go-to choice for off-road riders seeking reliability and performance. Specially designed for the 2021 Fantic XX/XE 125 and Yamaha YZ/YZF 125/250/450 series (1999+), this sprocket delivers a durable, consistent connection solution within the transmission/clutch system.

• Number of teeth: 51 teeth for balanced cruising speed and torque response
• Material and finish: Combination of steel and aluminum with a striking blue inner ring for strong performance and a long service life
• Type/position: Rear sprocket, part of the transmission/clutch system
• Compatibility: Fits Fantic XX/XE 125 (2021) and Yamaha YZ/YZF 125/250/450 (1999–current) models
• Brand: Airtime, known for reliable drivetrain components for enduro and motocross

With this rear sprocket, you’re choosing a combination of ruggedness and thoughtful engineering. The steel and aluminum construction delivers impact resistance exactly where it matters most, while the blue inner ring adds a premium aesthetic and reliable chain fit within the chain case. The 51 teeth deliver sharper acceleration response and consistent performance under high loads, which is especially noticeable on technical trails and for sport riders. It’s a smart upgrade that supports drivetrain durability without adding unnecessary weight.