EK CHAIN EK/PBR 520MRD7 13/51 - Ultra-Light Rear Sprocket Chain kitYAMAHA 250 YZ 250 F (CG33) - 2010 - 2013Ref : EKC01537A / 3066045

EK/PBR 520MRD7 13/51 Chain Kit - Ultra-Light Sprocket

This chain kit is designed for motocross riders seeking a clear and lightweight transmission. This EK CHAIN kit combines a 520 MRD7 chain in gold finish with an ultra-light aluminum sprocket (51 teeth) paired with a 13-tooth pinion — a common choice for enduro/cross bikes where the weight/performance ratio matters. It is designed to be mounted on machines like the YZ 250 F and other 250cc models compatible with the 520 pitch.

• Type: 520 chain kit (chain + 13-tooth pinion + 51-tooth sprocket)
• Chain: 114 links, Gold/Gold finish
• Pitch: 520
• Sprocket: Ultra-light aluminum
• Weight: 1.47 kg for 100 links (manufacturer value)
• Relative lifespan: 450 (reference for 100 links)
• Manufacturer reference: Not provided

This kit provides a significant weight reduction at the sprocket level, which is useful for improving handling and responsiveness out of corners. To keep the transmission effective, follow maintenance recommendations: proper tension, regular lubrication, and link checks before each ride. Ensure compatibility with your model before installation.