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Stainless Steel Engine Mount Bolts (Motor Mounting Screws) – Hyosung GT125 GT250

Estimated delivery dates: Aug 6, 2026 - Aug 7, 2026

£19.99

🔩 ENGINE MOUNT BOLTS // SECURE THE MOTOR 

Prevent seized hardware and dangerous frame stress on your V-Twin. These structural engine mount bolts serve as your mechanical insurance during a frame restoration, ensuring you don’t get left stuck in the garage drilling out sheared or rounded factory fasteners. Machined in the UK from solid high-tensile stainless steel, they shield your engine mount alignment from weathering while vastly outperforming cheap, untrusted hardware.

  • UK-Made Quality // Precision engineered in the UK to high durability standards.
  • Corrosion Proof // Genuine stainless steel—they will not rust or seize.
  • Safety Critical // The main bolts securing your engine to the frame.
  • 📦 What’s Included // 3x SS Bolts, 3x SS Matching Nuts.
BESPOKE UPGRADE: This is a custom, Hyosung-specific solution for a highly common chassis problem when swapping engines, dealing with old seized bolts. 
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Description

When performing a detailed engine overhaul or repainting your main frame, dealing with heavily corroded factory engine mount bolts is a major headache. The original mild steel bolts are highly prone to seizing solidly in place or shearing off completely during removal. Our premium UK-manufactured stainless steel replacements are engineered specifically for this load-bearing application. Given that your V-Twin engine can account for over 30% of your bike’s entire weight, this is a critical structural point where you should never gamble on cheap, unrated hardware bodge fixes. These are built to outlast the motorcycle itself.


💎 The Ultimate Stainless Upgrade & Visual Look

We offer superior material hardware that provides enhanced tensile performance alongside a clean, non-rusting finish that brightens your frame assembly lines.

UK Precision Made
Strict thread quality control ensuring accurate engagement during high vibration.
Will Not Corrode
Stops critical mounting bolts from seizing inside the soft alloy engine casings.
High Tensile Strength
Engineered to meet or exceed original factory safety tolerances for security.
Clean Finish
Stays bright and uniform with zero unsightly orange rust streaks down your painted frame.

📜 Confirmed Fitment Guide

✅ FITS: Hyosung GT125, GT125R, GT125RC, GT250, and GT250R (Covers all V-Twin 125cc and 250cc engine designs).
📅 YEARS: All model production runs from 2003 through to 2020+.

❌ WILL NOT FIT: Single Cylinder models (RT125 / RX125 / GD250N Exiv) or any 650cc powerplants. Chassis spacing and bolt lengths vary completely.

💡 RECOMMENDED PAIRING:
Match your upgrade hardware! Eliminate all dull casing bolts completely by pairing these structural studs with our comprehensive **Stainless Engine Cover Bolt Kit** for a totally refreshed look. View Cover Bolt Kits here.

🔧 Install Tips

  • Torque Spec: Always apply an accurate torque wrench and tighten the nuts firmly to the precise factory specifications mapped in your service manual. Never guess structural hardware tightness.
  • Anti-Seize: Wipe a thin, clean layer of anti-seize lubrication compound across the bolt threads prior to fitting. This is essential when threading stainless steel hardware through cast alloy chassis components.

Reference OEM #: 09103H10153, 09103H10022, 09103H10099

📧 NEED AN EXTRA HAND? If you’re tackling a total bare-frame rebuild and require hardware sizing advice, email our team with your model year. For workshop torque matrices, wiring schematics, and teardown diaries, head over to the HyoRiders Club Forums.

Additional information

Weight 0.9 kg
Dimensions 300 × 20 × 3 cm

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Independent Shop supplying ride enhancements and quality spares with fast dispatch. Need assistance? Access our workshop guides, manuals, tutorials or drop by the forums for troubleshooting help.