Name: Neutral Sensor (Gearbox Switch Drive) O-Ring Seal - Various Hyosung Models
SKU: 09280-26003
Availability: InStock

Neutral Sensor (Gearbox Switch Drive) O-Ring Seal – Various Hyosung Models

Estimated delivery dates: May 16, 2026 - May 18, 2026

£4.99

💎 NEUTRAL SENSOR O-RING SEAL | NO MORE OIL WEEPS

No more mystery oil drips. This small, genuine-spec O-ring is a critical maintenance item. It stops oil weeping from the gearbox/stator area that can spray onto your rear tyre—a simple fix for peace of mind.

✅ Safety Fix: Prevents oil spray near the rear tyre caused by old, flat seals.
🛠️ Genuine Spec: Direct-fit replacement quality for reliable, long-lasting performance.
⚙️ Maintenance Must: Essential whenever replacing a sensor or performing routine service.
📦 Peace of Mind: A simple, cheap part that prevents costly, messy problems.

💡 INSTALL TIP: This O-Ring sits behind the sensor located under the front sprocket cover. Don’t overtighten the sensor housing when reinstalling—the engine casings are aluminium and can crack easily!

Description

Over time, the neutral sensor’s rubber O-ring becomes flat and hard due to engine heat and age. This can lead to a slight oil weep that riders often mistakenly confuse with a major sprocket shaft leak. This genuine-spec O-Ring provides the reliable seal needed to keep the oil where it belongs. It’s a cheap but critical part for maintaining your Hyosung and ensuring safe life on the road.

💎 Essential Maintenance, Zero Fuss

A small part that delivers massive peace of mind and prevents potential safety issues.

Stops Leaks Prevents messy oil spray near the front sprocket.	Heat Resistant Built to withstand engine temperatures and last longer.
Direct Fit Guaranteed fitment for all listed models (OEM Ref: 09280-26003).	Easy Install Simple swap-and-go maintenance job.

📜 Confirmed Fitment Guide

✅ FITS (Covers Nearly All Legacy Models):
• GT125/R, GT250/R/EFI, GT650/R/EFI (2003-2021)
• GV125/250/650 Aquila, ST7 (Carby & EFI models up to ~2018)
• GD250N/R, RX125, RT125D Karion

❌ WILL NOT FIT: Newer GV125-S or GV300-S models from 2019 onwards.

💡 MAINTENANCE REMINDER:
Since you’re already in the sprocket area, it’s the ideal time to check your chain tension and condition. See our Chain Kits for the definitive performance upgrade! View Chain Kits here.

🔧 Install Tips

Gentle Removal: Carefully remove the old sensor. The plastic housing can become brittle with age.
Lube the Seal: A dab of fresh engine oil on the new O-ring helps it seat correctly without tearing.
Hand Tighten: Secure the sensor hand-tight only, then use a wrench for a very small final nip. Do not use excessive force.

📧 FITMENT QUESTIONS? Email us with your bike details. For technical help or community opinions, visit the HyoRiders Forums.

OEM Ref#: 09280-26003