Start from your pitch, compare the lines on the manufacturer's own numbers — tensile strength, seal type, engine-size rating — and size the length from your bike's OEM gearing.
Pitch is the chain's link spacing — your bike takes exactly one (it must match both sprockets). Pick a bike in the shop bar and we mark your OEM pitch; 520 kits can convert most 525/530 sportbikes to lighter gearing.
Changing sprockets changes the length you need. From your OEM link count: add half the total teeth you go up (rounded to the next even size).
