Renthal – Renthal Front Sprockets - Honda CR / CRF - 520 Pitch, including 92-24 CR250R and CRF250R-450R grooved sprockets, 88-05 CR250R and CR500R sprockets, 87-03 CR125R sprockets, 19-24 CRF450L and CRF450X sprockets and 18-21 CRF250R Ultralight sprockets, this is the busiest front sprocket group for Honda dirt riders, and for good reason: a countershaft sprocket is a fifteen-minute job that changes how the whole bike feels. Coverage runs from 1987-2003 CR125R and 1988-2005 CR250R and CR500R two-strokes through 1992-2024 CR250R, CRF250R, CRF450R, RX, X and RWE models, TRX450R quads, 2019-2024 CRF450L and CRF450X dual-sport and off-road bikes, and CRF250F and XR250R trail machines, in 520 pitch with 12, 13, 14 and 15 tooth options. Going down a tooth pulls the gearing shorter for tight tracks, woods and steep terrain, while an extra tooth stretches each gear for sand, desert and fast outdoor circuits. Most are grooved, using relief cuts that clear packed mud and reduce friction against the chain, and Ultralight versions shave rotating mass for quicker throttle response. Hardened steel resists hooking and keeps the chain running true.