Right crank FSA CK-745 Yamaha motor

FSA CK 745 crank arm: a robust solution for your Yamaha motor with JIS square taper axle

In the world of electric bikes, every component of the crankset plays a key role in transferring the rider’s pedaling power to the motor. Among these essential parts, the crank arm connects the pedals to the bottom bracket axle. The FSA CK 745 crank arm stands out as a high-quality part, perfectly compatible with Yamaha motors using a JIS square taper axle. Let’s take a closer look at its features and benefits.

Perfect compatibility with Yamaha motors using JIS axles

The FSA CK 745 is specifically designed for use with Yamaha e-bike motors that feature a JIS (Japanese Industrial Standard) square taper axle. This widely used standard ensures a stable and durable connection between the crank arm and the motor's axle. The JIS interface allows for a secure, precise fit that holds up even under demanding riding conditions.

Technical specifications of the FSA CK 745 crank arm

• Axle type: JIS square taper

• Material: forged aluminum for strength and low weight

• Crank length: typically 170 mm

• Fixing: single central bolt for secure installation

• Finish: matte black, clean aerodynamic design

• Compatibility: Yamaha PWseries motors and other JIS-compatible systems

Thanks to its aluminum construction, the CK 745 crank arm offers an excellent balance between stiffness and lightweight performance—key for maintaining the overall balance of an e-bike crankset.

Why choose the FSA CK 745 crank arm ?

In addition to its perfect compatibility with Yamaha systems, the FSA CK 745 impresses with its reliability. Whether you're commuting, touring, or riding more rugged terrain, it provides smooth power transfer and proven long-term durability.

It’s also a great replacement part if your original crank arm is worn or damaged. Easy to install, it allows you to restore your crank system without replacing the motor or the bottom bracket.

Made by FSA: trusted performance and quality

FSA (Full Speed Ahead) is a well-known brand in the world of road bikes, MTBs, and electric bikes, appreciated for the precision and durability of its components. The CK 745 model lives up to this reputation, meeting the needs of casual riders and performance-oriented cyclists alike.

In summary

The FSA CK 745 crank arm for Yamaha motors with JIS square taper axles is a must-have part for maintaining or upgrading your e-bike’s crankset. Durable, lightweight, and highly compatible, it ensures efficient power transfer while withstanding the challenges of daily riding. A smart choice for riders who care about quality and performance.