The EK/PBR 520MRD7 13/49 chain kit is a transmission set designed for motocross use: a reinforced 520 chain combined with a 13-tooth front sprocket and a 49-tooth rear sprocket (standard steel sprocket). Designed for intensive use on loose and rugged terrains, it offers dimensional stability suited to the demands of off-road riding without unverified technical claims.
- Manufacturer reference: Not provided
- Type: 520 chain kit (chain + 13-tooth sprocket + 49-tooth sprocket)
- Number of links: 114
- Pitch: 520
- Color: Gold / Gold
- Sprocket material: Steel
- Weight: 1.47 kg for 100 links
- Relative lifespan index: 450 (for 100 links)
This kit is aimed at motocross riders looking for a robust replacement solution compatible with the original setups of the listed 450 cross models. To ensure longevity and safety: regularly check the tension, lubricate the chain after each muddy ride, and replace it as soon as noticeable wear or excessive stretching occurs.
Common compatibilities:
- FANTIC XXF 450 (2026 - 450 cm3)
- YAMAHA YZ 450 F (2022 - 450 cm3)
- YAMAHA YZ 450 F (CJ23) (2021 - 450 cm3)