Renthal – Renthal Front Sprockets - Honda ATV - 520 Pitch, including 86-89 Honda ATC 250R and TRX 250R Fourtrax grooved sprockets in 13 and 14 tooth, and 05-13 Honda TRX 400EX sprockets in 13 and 15 tooth, sport quads are hard on countershaft sprockets. You are loading the drivetrain from a standstill, feeding power through a chain that is caked in sand and mud, and doing it with far more traction than a bike has. The 520 pitch front sprockets in this group are cut for classic and modern Honda quads, covering the 1986-1989 ATC 250R and TRX 250R Fourtrax as well as 2005-2013 TRX 400EX and 400E machines. Tooth counts from 12 to 15 let you decide how the quad delivers its power: drop a tooth at the front for stronger bottom-end punch out of corners and up hills, add one for taller gearing and calmer rpm on open ground or dunes. The grooved profile is a signature detail, machining relief slots that shed mud and debris and cut down on drivetrain drag. Made from hardened steel for wear resistance, these sprockets keep tooth shape and chain alignment longer, which protects the chain and rear sprocket and keeps power delivery smooth and predictable.