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Front Engine Sprocket Nut - Hyosung GD250R GD250N

Front Engine Sprocket Nut – Hyosung GD250R GD250N

Estimated delivery dates: Sep 4, 2026 - Sep 5, 2026

£14.99

💎 FRONT ENGINE SPROCKET NUT // SECURES MAIN DRIVETRAIN HOUSING

Drivetrain security for your GD250. Whether you are upgrading your chain or performing routine maintenance, this high-tensile sprocket nut ensures your front drive remains locked and safe. A direct-fit aftermarket match designed for the high-revving GD series.

  • Function // Secures the front drive sprocket to the output shaft.
  • Maintenance // Essential for chain/sprocket swaps or top-end rebuilds.
  • Quality // Zinc-coated for corrosion resistance (Yellow or Silver).
  • What’s Included // 1x Front Engine Sprocket Nut.
FITMENT NOTE: Reusing a bent locking washer can be hazardous if the metal tabs are already fatigued. Always pair this high-tensile fastener with a new matching safety washer to keep your front sprocket firmly locked in place during high-speed acceleration.
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Description

For a performance bike like the GD250R or GD250N Exiv, the front sprocket nut is the only thing keeping your engine’s power connected to your rear wheel. Over time, these nuts can suffer from vibration or improper torquing. Replacing a tired or rounded nut is essential for maintaining the integrity of your output shaft threads and ensuring your life on the road remains uninterrupted by mechanical failure.

💎 Secure Your Drivetrain with Quality Hardware

Direct FitNo grinding or modifications needed. OEM ReferenceAccurate dimensions matching 09140-16017.
Zinc CoatedResists road salt, rain moisture, and rust. High TensileHeavy-duty metal built for 250cc EFi power.

📜 Model Fitment

Confirmed Matches: Fits Hyosung GD250R (All years 2015–2020) and Hyosung GD250N Exiv (All years 2015–2020).

❌ WILL NOT FIT:

This specific thread dimension will not fit larger GT650 or GV650 models. Always verify your engine size before ordering.

💡 PAIRING RECOMMENDATION:
It is highly recommended to use a completely fresh tab locking washer whenever this output shaft nut is removed or replaced. A fresh washer ensures mechanical backing against heavy chain torque. View the GD250 Safety Locking Washer here.

🔧 Install Tips & Safety

  • Torque to Spec: Always clean the shaft threads and use an accurate torque wrench to seat the new nut to factory gearbox specifications.
  • Lock it Down: After tightening, use a flat-bladed tool or chisel to bend the outer edge of your locking washer firmly up against one flat face of the nut to lock it.
  • Thread Locker Option: For added peace of mind during long tours, apply a single drop of medium-strength fluid thread locker onto the output splines before spinning the hardware home.
📧 NEED EXACT OUTPUT SHAFT TORQUE FIGURES?
If you want to cross-reference factory service manuals or need advice on locking the transmission to safely undo old hardware, send our team an email. For diagnostic walk-throughs, sizing questions, or help from fellow garage mechanics, head to the forums.
SKU: 09140-16017-GT125 Categories: , , Tags: , , , , ,

Additional information

Weight 0.5 kg
Dimensions 10 × 10 × 2 cm

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