RK Chain 420MXZ-100FT 420 MXZ Heavy Duty Non O-Ring MX Racing Chain 100 Foot Bulk Roll

The RK Chain 420MXZ 100-Foot Bulk Roll delivers professional-grade mini motocross and supercross performance in a convenient bulk format, ideal for shops, teams, and builders who need chain on hand for multiple builds or custom-length applications. The 420MXZ is RK's heavy-duty non O-ring racing chain engineered for serious MX/SX competition.

Key Features:

• Chromoly steel construction with seamless rollers and bushings for smooth, low-friction operation
• Oversized special alloy pins heat-treated using RK's exclusive HIT (Heat Induction Transfer) process for maximum strength and durability
• Maximum tensile strength of 5,000 lbs — among the strongest in its class
• Maximum wear life index of 300 (standard index is 100)
• Maximum chain width: 17.2mm
• Maximum horsepower rating: 30 HP
• Max displacement rating: 150cc street / 125cc off-road
• Non O-ring design optimized for lightweight, high-revving mini racing applications
• 100-foot bulk roll — cut to any length as needed

RK Takasago has been manufacturing motorcycle chains since 1953 and serves as an OEM supplier to Honda, Yamaha, Suzuki, and Kawasaki. The 420MXZ series is trusted by professional race teams competing in AMA SX/MX, including Monster Energy Pro Circuit Kawasaki and FMF KTM Factory Racing. The 100-foot bulk roll format makes this an excellent choice for dealers, race teams, and builders who require flexibility in chain length for custom or production use.