D.I.D's professional high-performance non-O-ring chain treated with a patented SDH pin treatment. This forms an extremely hard chromium-carbide layer on the pin surface while maintaining a soft inner core for shock absorption. This results in greater rigidity, 5% to 25% longer life, up to 19% higher tensile strength, and increased anti-oxidation...

Premium X-Ring chains where all components are shot-peened and heat-treated. Features a patented 'TFC' connecting link and a special low-friction 'X' type O-ring to increase performance and provide better sealing to keep dirt out and lubrication in. Offers superior strength to combat breakage. Originally comes with a rivet connecting link.

D.I.D's high-performance O-ring chain with solid bushings for the longest possible wear and reinforced rollers for the greatest impact resistance. Recommended for machines originally equipped with O-ring chains. Originally comes with a clip connecting link.

A line of low-cost, high-quality solid roller chains featuring quad-staked pin riveting, special alloy steel construction, and an extended riveted bushing anti-kink design. Chains are pre-stretched at the factory and are intended for motorcycles originally equipped with non-O-ring chains. Each chain originally comes with a clip connecting link.

Retains all the low-friction, high-performance characteristics of the ZVM-X, but with improved rigidity for greater wear resistance and better overall chain life. Features maximum rigidity and originally comes with a rivet connecting link.

Greatly increased sealing performance with four sections. Keeps dirt out and lubrication in. Lowest friction of all type of O-rings. Twisting action disperses the pressure and minimizes power loss. Maximum wear resistance.

Pins for ER chains are put through a special patented heat-treatment process that produces a 1.5 times harder than conventional carbon heat treating, providing the highest wear resistance, tensile strength and impact resistance available. ER chain is used by top motocross/supercross OEM works teams and has a distinctive gold-plated finish....

Greater rigidity brings smoother handling, reduced power loss, and quicker response. Available in gold (G&B) or natural (unplated steel). Average tensile strength 9,220 lbs. Pre-stretched at the factory. VX Series replaces the Professional O-ring V Series and the Premium X-ring VM Series. Features the highest value and longest life in all D.I.D....

Complete chain and sprocket kits featuring a low-friction X-Ring® Chain, a Chromoly steel front sprocket, and a high-carbon steel rear sprocket. D.I.D's patented X-Ring design offers superior sealing properties, keeping dirt out and lubrication in for the longest wear life. The X-Rings twist between the side plates to reduce friction and minimize...

Precise forging process leads to a stiff chain for better acceleration and more efficient engine work. Lightening hole allows for a lighter chain without compromising strength while removing mud and dispersing heat more efficiently. Non-sealed to reduce as much friction as possible. Chromium carbide pin surface coating increases hardness and...

For motocross use only. Tensile strength of 8,900 lbs. Includes clip connecting link. Maximum engine size: 500cc.

Economical QX-ring chain. Uses the same QX-ring as the SRX2 series chain.

The only reliable choice for serious racers, available in DRZ2 and MS series.

Super-economical roller chains made from a special steel alloy with solid rollers and pre-stretched, shot-peened parts. Available in Standard and SR Heavy-Duty series.

The finest motocross chains for the world's fastest riders. 428 SHDR chains include a clip connecting link.

Value O-ring chain that doesn't compromise quality or durability. High-tech heat-treated steel alloy construction. 420 SRO/428 SROZ chains include semi-press fit clip connecting link. 520 SRO6 chains feature lightening holes and includes rivet connecting link.

For competition and OEM replacement. Excellent value for any street machine. Features lightening holes, reduced friction and Quadra X-Ring design, which increases wear life from 1.5 to 2 times longer than a standard O-ring chain. 520 SRX2 chains come with clip-type master link. 525 and 530 SRX2 chains come with rivet-type master link.

EK's strongest chains developed specifically for extreme sportbikes. For competition and OEM replacement. New NX ring lasts 15% longer than previous ZVX series chains, minimizes clearance between plates, and features improved stiffness and weight.

Cross-reference guide for drive chain specifications for various Yamaha motorcycle models.

Cross-reference guide for front and rear sprocket sizes for various Yamaha motorcycle models.

High-quality O-Ring and X-Ring style motorcycle chains, available in various sizes and pre-cut lengths. All chains are shot-peened, pre-stretched, and made in Japan.

Developed to withstand the severe stresses of off-road riding. Features larger diameter alloy carbon steel pins and thicker plates for increased tensile strength and fatigue resistance. Extended bushings and solid rollers provide improved durability. Gold color.

High-carbon alloy steel connecting links for 520 ZSE chains.

Manufactured with high-carbon alloy steel. Features shot-peened rollers, pins and plates, solid bushings, and is pre-stretched to enhance performance. Natural steel color.

Designed to withstand the severe application of drag racing. Features high alloy steel 'gold' plates and pins and solid bushings and rollers. Plates, pins and rollers are shot-peened for improved fatigue resistance. Breaking strength of 10,566 lbs. and a fatigue limit of 2,135 lbs. Includes master links.