This is a JT Sprockets front and rear kit with a JTR X1R X-Ring Chain.

Sprocket Specs:

JT sprockets are made using only the best available materials. SCM420 chromoly steel alloy for front sprockets, and we are the only sprocket manufacturer using the ultra-durable high carbon C49 steel for rear sprockets.

Chain Specs:
Pitch: 428
Chain Links: 134 Links
Weight: 2.47 lb weight per 100 links
6173 lb tensile strength