Name: Renthal Racing Front Engine Sprocket (for 520 Chain Kit) - Hyosung GT125R GT250R GT250
SKU: 27510HJ8200
Availability: OutOfStock

Description

🏁 Renthal Racing Front Engine Sprocket
for 520 Chain Kit — Hyosung GT125R / GT250R / GT250

Upgrade your drivetrain with a genuine Renthal racing sprocket — engineered for riders who demand precision, strength and race-proven reliability. If you’re running a 520 chain conversion kit on your Hyosung GT125R, GT250R, GT250 or GV250, this front sprocket gives you cleaner power delivery, better chain life and a sharper throttle response.

🔧 Renthal Technical Notes

Renthal front sprockets are manufactured from a specially developed nickel-chrome-molybdenum steel, case hardened and core refined for a superior combination of surface strength and core toughness. The grooved tooth profile allows mud and debris to escape — preventing build-up that accelerates chain wear and causes extra drivetrain stress.

Why Renthal	Key Benefits
Competition-spec materials & heat treatment	Lighter than many OEMs, improved wear resistance
Grooved tooth design	Excellent mud & water drainage — fewer chain issues
Precision machining	Consistent torque transfer and long service life

THIS IS A REPLACEMENT RACING SPROCKET FOR 520 CHAIN KITS ONLY.

⚓ Lighter weight	❄ Better weather drainage
🔩 Competition spec	⚙ Genuine Renthal

Same acceleration gearing as our JAP 520 chain & sprocket kit — makes GT125 & GT250 feel slightly quicker vs the Korea setup (also fits GV250 Aquila).

📦 UK Stock / Shipping:
Delivery time approx. 1–2 weeks — ordered direct from trade supplier.
🌍 Global shipping available — contact us for a quick quote.

🛠 Fitting Instructions: None — simply swap & go. If you want help or step-through guidance, visit our (Fitting Guides).

🏍 Model Fitment & Notes

GT125R & GT125 Naked

Requires 428→520 conversion kit

(2003–2019)

GT250 Comet & GT250R

Swap & go — replace old sprocket washer

(2003–2019)

GV250 Aquila

Swap & go — replace washer too

(2003–2019)

💡 Install Tips

🧰 Inspect the countershaft and keyway for wear before fitting the new sprocket.
🔩 Replace the sprocket washer & safety lock if they show signs of wear — they’re cheap insurance.
⚖️ Torque the retaining nut to manufacturer spec and check final chain tension after 50 miles.
🧽 Clean the chain and sprockets and apply fresh chain lube — helps break-in and reduces wear.
🔁 If converting from 428 → 520 ensure the full conversion kit (front sprocket, rear sprocket, chain & spacers) is correct for your model.

Reference OEM Part No: 27510HJ8200
Need advice before ordering? Contact us — our Hyosung specialists will help pick the right parts and answer fitment questions.