Replace your transmission in one go with this JT DRIVE CHAIN kit: 13-tooth sprocket, 69-tooth rear sprocket, and HDR chain pitch 428. Designed for road use on roadsters, this kit brings together steel components built to last and reliably transmit power. Ideal for a complete maintenance or a transmission overhaul.

• Chain: HDR, pitch 428, 138 links, steel color, super-reinforced quality.
• Tensile Strength: 24.5 kN — value measured for the supplied chain.
• Rear Sprocket: standard steel, 69 teeth.
• Front Sprocket: standard steel, 13 teeth.

• Complete kit to replace rear sprocket, front sprocket, and chain in one operation.
• Steel components for good mechanical strength and controlled wear.
• Super-reinforced chain suitable for the road demands of roadsters.

• Check compatibility of lengths and number of links before installation.
• Adhere to recommended play and tension, check alignment of the rear sprocket and front sprocket.
• Regularly lubricate the chain and check for wear to ensure optimal longevity.

Application examples: APRILIA RX 125 (2023, 2024, 2025) — suitable for roadsters and motorcycles requiring a 13/69 kit in 428.