The Regina 520 DR Extra Drag Racing Chain is engineered for the severe demands of competitive drag racing. Designed for use on high-performance motorcycles, this 150-link chain delivers the durability and fatigue resistance required for demanding launches, rapid acceleration, and repeated race conditions. Its 520 size provides compatibility with applications specified for Regina 520 DR chain systems.
Plates, pins, and rollers are shot-peened to improve fatigue resistance and help support consistent performance under high loads. With a breaking strength of 10,566 pounds and a fatigue limit of 2,135 pounds, the Regina 520 DR Extra is suitable for applications up to the Pro Stock level when properly installed and maintained. The chain is supplied with a clip-and-rivet-type link for installation flexibility and secure assembly.
Manufactured by Regina and identified by manufacturer and vendor part number 135DR/1003, this drag racing chain is intended for race-focused motorcycle applications that require a robust, purpose-built drivetrain component. Verify chain size, link count, sprocket compatibility, and manufacturer fitment requirements before installation. Proper alignment, lubrication, tension, and maintenance are essential for reliable service and safe operation.
Features:
- Size: 520 drag racing chain
- Model: DR Extra
- Brand: Regina
- Manufacturer part number: 135DR/1003
- Vendor part number: 135DR/1003
- Link count: 150 links
- Application: Designed for severe drag racing use and suitable for applications up to Pro Stock level
- Construction: Plates, pins, and rollers are shot-peened for improved fatigue resistance
- Breaking strength: 10,566 pounds
- Fatigue limit: 2,135 pounds
- Included link: Clip-and-rivet-type link
- Fitment: Intended for motorcycle applications using compatible 520-size chain and sprocket systems