## **520 Chain Size Explained: Pitch, Length, and Width**
If you ride a motorcycle, you already know the chain is one of the hardest-working parts on the bike. But when it comes time to replace it, terms like “520” can feel like a secret code. Don’t worry—by the end of this guide, you’ll understand **520 chain size** perfectly and know exactly what to buy.
### **What Does 520 Actually Mean?**
A 520 chain follows a simple numbering system that describes its **pitch and width**. The first number relates to pitch, and the last two digits indicate the inner width. Specifically, a 520 chain has a **pitch of 5/8 inch (15.875 mm)** and a **roller width of 1/4 inch (6.35 mm)**.
To see how 520 fits among other sizes like 428 and 530, this detailed 520 chain size breakdown makes comparison easy.
### **Why Pitch and Width Matter**
**Pitch** is the distance between three consecutive rivet pins. A 5/8-inch pitch gives the 520 chain a heavier, stronger build than smaller 428 chains, which are common on mini bikes. This makes it ideal for **middleweight motorcycles** from 250cc to roughly 700cc.
**Width** determines how the chain sits on the sprocket. The 1/4-inch inner width is narrower than a 530 chain (3/8 inch), reducing weight without sacrificing much strength.
### **Common Motorcycles That Use 520 Chains**
Many popular models rely on this size, including:
– **Honda:** CBR500R, CB500X, CRF450R
– **Yamaha:** MT-07, YZF-R6
– **Kawasaki:** Ninja 400, Ninja 650
– **KTM:** Duke 390, 500 EXC
If your bike falls in the 250cc–700cc range, there’s a strong chance a 520 chain is your factory fitment.
### **Length: Choosing the Right Number of Links**
Chain length is measured in **links**, not inches. Common 520 chains come in 110, 114, 118, or 120 links. Your owner’s manual specifies the exact count. If you change sprocket sizes, you may need to add or remove links using a chain breaker tool.
### **520 vs 525 vs 530: Quick Comparison**
– **520:** 5/8″ pitch, 1/4″ width — lightweight, great for sport bikes
– **525:** 5/8″ pitch, 5/16″ width — a middle ground
– **530:** 5/8″ pitch, 3/8″ width — heavier, for liter bikes
All three share the same pitch, so **sprockets are not interchangeable** between them due to width differences.
### **Frequently Asked Questions**
**Can I replace a 525 chain with a 520?**
Only if you also change both sprockets to 520-spec parts. Mixing sizes causes rapid wear.
**How often should I replace a 520 chain?**
Inspect every 500 miles. Replace when you find stretched links, tight spots, or more than 1% elongation.
**Is a 520 chain strong enough for track riding?**
Yes, quality O-ring or X-ring 520 chains handle track abuse well when properly maintained.
### **Ready to Upgrade?**
Understanding **520 chain size** empowers you to buy with confidence. Always match your chain, front sprocket, and rear sprocket as a set, and keep them clean and lubricated for maximum life.
**Check your owner