ProTaper PT520 Pro Series Chain

The ProTaper PT520 Pro Series Chain is a high-performance, non-sealed competition racing chain engineered to replace stock drive chains with a high-strength, low-friction driveline link. Designed specifically for modern motocross, supercross, and arena racing, the PT520 is constructed to withstand the brutal instantaneous torque spikes of modern fuel-injected four-strokes while minimizing frictional drag and rotational inertia.

Manufactured in Japan to rigid aerospace tolerances, the PT520 utilizes premium high-carbon alloy steel link plates that are shot-peened and heat-treated to resist stretching and fatigue failure under extreme competition loads. The chain features solid bushings and solid rollers that resist impact deformation from rocks and hard jump landings. With an outstanding tensile strength rating exceeding 8,400 lbs, the PT520 provides reliable power delivery without stretching out after every moto. The gold-plated side plates provide a durable barrier against rust and chemical corrosion while elevating the bike's aesthetic appeal.

Technical Specifications & Engineering Specs

• Chain Pitch: 520 Pitch (Standard 5/8" x 1/4" dimensions)
• Construction: Premium non-sealed Japanese competition racing chain
• Tensile Strength: 8,400+ lbs rating for maximum shock load resistance
• Bushing / Roller Type: Cold-formed solid bushings and solid seamless rollers
• Plating: Gold-plated outer link plates with natural shot-peened inner links
• Link Count Options: Standard 120 links (trimmable to exact wheelbase specification)

Step-by-Step Installation & Safety Protocols

Installation is straightforward using standard 520 chain tools. Cut the chain to the correct link count for your gearing setup. Thread the chain through the driveline components, wrap the ends around the rear sprocket, and insert the supplied clip-type master link. Press the outer side plate into position and clip the spring retainer into place with the closed loop facing forward in the direction of chain rotation. Set rear axle block alignment marks evenly on both sides of the swingarm to ensure perfect sprocket alignment, set chain slack to 50-55mm, and torque the axle nut to manufacturer specs.

Maintenance & Care Routine

Maintenance consists of routine post-wash cleaning with a non-acidic chain cleaner, blow-drying thoroughly, and applying a high-grade synthetic chain lube before every moto to prevent friction and heat buildup.

Frequently Asked Questions