DID 415ERZ 144 links Motorcycle Drive Chain

DID 415ERZ Racing Chain | 144 Links | 415 Conversion

The DID 415ERZ 144-link chain is built for 415 conversions on 300cc-class race bikes such as the Kawasaki Ninja 250, 300,400,500 KTM RC390 and the Yamaha YZF-R3. It is a high-performance, lightweight, low-friction chain made for small-displacement racing—not for street use.

Why convert from 520 to 415
A 520 chain is heavier and larger than a race bike in this class needs. Moving to 415 cuts pitch size, chain mass, and usually sprocket mass with it. That is rotating weight at the countershaft and rear wheel. Extra rotating mass takes more energy to accelerate and throws away horsepower as friction. A 415 chain reduces that loss so more power reaches the ground and the bike picks up revs faster.

On Ninja 250/300/400/500 KTM 390 and R3 race bikes, a 415 conversion is one of the most effective ways to shed drivetrain weight. The smaller chain also packs tighter, which helps when you are building a dedicated track or Moto3-style machine. Pair the chain with a 415 conversion kit (sprockets and related hardware) for the full weight and friction benefit.

DID 415ERZ performance
The 415ERZ is designed around Moto3-level demands. Exclusive Super Dai Hard pins go through a patented heat-treatment process that makes them about 1.5 times harder than conventional carbon heat treating. Wear resistance is twice that of the original D.I.D. 415ER, and average tensile strength is 4,540 lbs—about 15% higher. This is a non-O-ring racing chain: less drag than sealed street chains, built for the track.

DID 415ERZ-144 specs

• Gold outer and inner plates
• 144 links
• Average tensile strength: 4,540 lbs
• Non-O-ring racing chain
• Includes one matching clip
• Weight: 1 lb 15.7 oz

Track use only. Not for street use.

Spears Racing has designed race products for decades, including application-specific 415 conversion components that go through research and development for small race bikes.