Start from your pitch, compare the chains 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 your bike above and we mark your OEM pitch; 520 kits can convert most 525/530 sportbikes to a lighter setup.
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).
