Basics
A motorcycle chain comprises two precision ground pins peened at each end as a rivet, two bushes, two rollers and two side plates. A further pair of outer side plates join each link to the next link. In O ring chain a round seal is fitted on the pin between the plates to retain lubricant. The seal is contoured for less drag in X ring chains.
The Number of links is measured by the number of pitches, which is the gap between each pin or rivet and includes a Spring/clip or Rivet link to give an even number.
Please note that we supply lengths of chain to fit standard sprockets. When using sprockets with 2 or more extra teeth a chain with more links is often needed. Feel free to call for any assistance.
Metric Dimensions
| Chain | Pitch | Width | Roller Diameter |
|---|---|---|---|
| 415 | 12.70mm | 4.88mm | 7.75mm |
| 420 | 12.70mm | 6.35mm | 7.75mm |
| 428 | 12.70mm | 7.75mm | 8.51mm |
| 520 | 15.88mm | 6.35mm | 10.16mm |
| 525 | 15.88mm | 7.85mm | 10.16mm |
| 530 | 15.88mm | 9.53mm | 10.16mm |
| 532 | 15.88mm | 9.53mm | 11.10mm |
| 630 | 19.05mm | 9.53mm | 11.91mm |
| 632 | 19.05mm | 9.66mm | 12.68mm |
Side plate thickness varies with grade and make of chain. As a rule, 1.5 to 2.6 mm. It is important for safety to join chain with the manufacturers correct Rivet Soft Link or Split Spring Link.
Size, Manufacturer, and grade are often stamped on some of the side plates.