
EK/PBR 520M3 Chain Kit 14/49 - Ultra-Light Sprocket by EK CHAIN: a transmission kit designed for motocross where every gram and every throttle response matters. This kit combines a 520 pitch chain and an ultra-light aluminum sprocket to reduce unsprung weight without sacrificing compatibility with competitive and recreational motocross bikes.
Designed to withstand the demands of off-road riding, this transmission is aimed at KX250 riders (2000–2002) and other motocross machines compatible with the 520 pitch. To get the most out of the kit, regularly check the tension, clean and lubricate the chain after each muddy outing. Professional installation is recommended to ensure proper alignment and optimal longevity.