







The EK/JT 520SRX2 16/43-110 chain kit is aimed at riders looking for a reliable and balanced final drive for their roadster. Offered by EK CHAIN, this kit includes a 520 pitch chain, a 16-tooth front sprocket, and a 43-tooth rear sprocket (110 links), all in a gold finish that adds a visible touch to the transmission.
The SRX series aims for a good compromise between cost and durability, suitable for road use and the quick accelerations of roadsters. This kit allows for the replacement of the sprocket/chain/sprocket assembly to restore a quiet transmission and predictable handling. Before installation, check the alignment, tension, and condition of the shafts and spacers; proper adjustment extends the lifespan of the final drive. Compatible with several roadster models, including APRILIA TUONO 660 FACTORY (2023–2025), be sure to confirm the exact compatibility with your machine.