Description
Your front sprocket nut might be a small component hidden underneath the engine casing panel, but it plays an incredibly critical role in keeping your entire drivetrain secure. Whether you are executing a full chain and gear replacement on the workbench or just want complete peace of mind before a long road trip, this high-tensile replacement nut is an essential, cost-effective safety update. As your bike handles daily riding and touring, a fatigued or stretched original fastener can gradually work itself loose. Sourcing this fresh Hyosung front sprocket nut prevents catastrophic shaft slippage and dangerous ride failures, keeping your machine fully secure across your latest restoration project.
This aftermarket replacement part is manufactured precisely to original factory specifications to ensure absolute torque retention and perfect thread engagement. The heavy-duty steel body absorbs intense single-cylinder or V-twin firing pulses cleanly without backing away under regular riding conditions. Sent from our UK inventory in a durable protective finish, this part replaces your rounded or weathered original nuts cleanly, making future sprocket swaps completely hassle-free on everyday journeys.
💎 TRANSMISSION SECURITY HYOSUNG FRONT SPROCKET NUT OVERVIEW
| Original SpecificationTurned accurately to mirror factory thread pitch and width for zero binding on the shaft. | High-Tensile Structural SteelTough material build that resists stripping out when tightened down hard with manual tools. |
| Mandatory Maintenance SafetyProvides much better clamping pressure than an old, stretched nut that has been unbolted multiple times. | Direct Workbench MatchConfigured to drop straight into the original engine output shaft to replace reference part number: 09140-16017. |
📜 Confirmed Model Fitment
Hyosung Models: Output shaft diameters are verified strictly for the standard V-twin and single-cylinder bikes listed below within their specific model year ranges.
| GV Aquila 125 Up to 2017 models |
GT125R / GT125RC Up to 2021 models |
GT125 Naked Comet Up to 2021 models |
| GV250 Aquila 2003 to 2018 models |
GT250R / GT250RC Up to 2022 models |
RX125 / RT125D Karion All production years |
🔧 Installation Tips & Help
It is completely critical that you follow these workbench tips to secure a completely safe installation:
- The Lock Washer Replacement is Mandatory: You must swap out your original front sprocket washer/safety lock tab at the exact same moment on the bench. Neglecting this simple step can allow the bolt to slide off under load, leading to immediate engine casing cracks.
- Lock the Rear Wheel Securely: Put the transmission gearbox firmly into first gear and have a helper step hard down on the rear brake pedal. This stops the output spindle from rotating out of control while you apply force with your hand wrench.
- Torque to Spec and Fold the Tab: Tighten the new part down cleanly to full factory specification metrics using a manual hand tool. Once torqued down, use a chisel tool to bend the side flat tab of your lock washer flush against the hex nut edge to lock it physically.











![Front + Rear Wheel & Sprocket Hub Bearing Kit - Hyosung GV125 GV250 [2005-2017]](https://i0.wp.com/hyoriders.club/wp-content/uploads/2024/06/hyosung-gv125c-gv250-rear-front-wheel-bearings.jpg?fit=362%2C362&ssl=1)


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