Renthal Racing Front Engine Sprocket (for 520 Chain Kit) – Hyosung GT125R GT250R GT250

Description

Upgrade your main drivetrain assembly with a genuine premium Renthal racing front sprocket—engineered explicitly for riders who demand crisp precision machining, brute structural strength, and race-proven component longevity. If you are currently running a heavy-duty 520 chain conversion bundle on your V-twin cruiser or sport model, swapping your front engine gear is absolute key to achieving cleaner power delivery, extended link life, and a noticeably sharper throttle snap across your latest restoration project.

These competition-spec front engine gears are manufactured from a specially developed nickel-chrome-molybdenum alloy steel, case-hardened and core-refined to deliver a superior combination of extreme surface hardness and core toughness. The specialized grooved tooth profile allows wet road mud, grit, and winter grime to escape effortlessly under rotation. This advanced drainage prevents debris build-up that accelerates chain wear and causes unnecessary stress on your gearbox output shaft, keeping your transmission line running cleanly on everyday journeys.

💎 TRANSMISSION LINE HYOSUNG 520 FRONT SPROCKET OVERVIEW

📜 Confirmed Fitment Guide

🔧 Install Tips

This is a premium swap-and-go racing component. No specialized garage machinery or custom casing modifications are required. Full step-by-step walk-throughs and tension metrics can be found inside our community portal: View our Fitting Guides here.

• Examine the Countershaft Splines: Before sliding your new Renthal piece into place, clean the output shaft using a dry cloth. Inspect the keyway grooves closely for any notches or slop to prevent final drive vibrations.
• Renew Your Safety Washers: Always install a fresh locking tab plate and spindle nut when swapping your front engine gear. Reusing soft, flattened plates is a severe risk—fresh lock components are cheap insurance against loose hardware at high speeds.
• Torque and Re-Check Gearing Tension: Lock the nut using a manual hand torque wrench to official manufacturer specifications. Execute a short test ride, let the machine rest, and verify your link slack parameters after the first 50 miles.
• Flush the Links with Clean Lubricant: Scrape old sticky grit out of the casing guard before closing up the cover. Apply a fresh coating of dedicated chain lube over the sprocket teeth to allow a perfectly smooth break-in period.