D.I.D 520ERV7 X-Ring Chain

The chain carries all of the engine's power to the rear wheel. A worn one stretches, kinks and loses its lubrication, and you feel it as a snatchy, uneven drive on and off the throttle long before it lets go. Sealed-ring chains (O-ring, X-ring and similar) keep grease sealed inside every link, which is why they last far longer on the street than non-sealed chains.

• The 520 ERV7 chain boasts a 3% higher tensile strength due to stronger inner side plates and thicker pins
• Due to increased X-Ring durability, the ERV7 sees a 13% wear resistance increase
• 520ERV7 is the top-of-the-line racing chain for all types of motorcycle racing, on and off road
• Incredible design and utilization of D.I.D's patented X-Ring seal technology makes the ERV7 a top performing racing chain available
• Utilized by many factory teams worldwide
• Chosen by pitch and link count, not by bike model
• Count the links on your current chain, or check your owner's manual for the stock length

Change the chain and both sprockets together. A new chain on worn sprockets wears out quickly, and so do new sprockets on an old chain. If you change your gearing, the link count may change too.

From the shop

We highly recommend a rivet-type master link on any street bike. Fitting one takes a chain riveting tool, which you can buy from us in the shop, or we can install your chain and sprockets for you.