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Stainless Steel Crank Shaft Plug (Flywheel Stator Cover Cap) – Various Hyosung Models

Estimated delivery dates: Aug 17, 2026 - Aug 18, 2026

£14.99

💎 STAINLESS CRANK PLUG // HEAVY-DUTY FLYWHEEL CAP UPGRADE

Bin that soft factory metal plug. This solid, weighted stainless steel replacement is significantly more robust than the original part, providing a reliable multi-tool access point you can trust during engine maintenance.

  • Quality // Beefy build with more material weight so it will not strip or round off like the original cap.
  • Performance // CNC-machined stainless steel structure is corrosion-proof, weather-resistant, and less likely to seize up.
  • Reliability // Multi-tool drive profile lets you use a socket, hex bit, or large Allen key to turn the engine over.
  • Installation // Straightforward swap package that comes supplied complete with one heavy-duty crank plug and a fresh O-ring seal.
💡 INSTALL TIP: Perfect for accessing the flywheel assembly to perform essential valve clearance checks on your machine. You can view the full clip in our main product picture gallery above to see it in action.
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Description

Every mechanic working on these machines knows the typical struggle with the factory crank casing cap. It is made from a remarkably soft alloy with an awkward, thin single slot that shears and distorts easily the moment it experiences corrosion. This unique club creation provides a real performance upgrade. Real-world testing shows the increased thickness and superior material selection stop these common headaches completely, keeping your maintenance routines and road trips straightforward.

💎 ENGINE ACCESS SPECIFICATIONS

Corrosion FreeSalt-resistant properties engineered to handle harsh winter driving conditions. Robust DesignMore thickness built around the drive tool entry area so it won’t strip.
Easy AccessEnables the use of conventional workshop sockets rather than unbranded flat keys. CNC PrecisionClean thread profile that ensures perfect seating into your generator case.

📜 Confirmed Fitment Guide

Classic Generation Engine Group: Broadly covers nearly all classic carburetor and early fuel-injected model variants built before the modern chassis update.

  • Cruiser & Sport Series: GT125, GT125R, GT250, GT250R, GT650, and GT650R lines running from 2003 to 2021. Also fits classic GV125, GV250, GV650 Aquila cruisers, and ST7 models.
  • Single Cylinder Variants: GD250N, GD250R, RX125, and RT125D Karion.
❌ WILL NOT FIT THESE MOTORCYCLES:

  • Hyosung GV125S / GV300S Aquila Bobber: Modern post-2018 electronic fuel injection engine designs utilize a completely separate crankcase dimension standard.
💡 RECOMMENDED PAIRING: Complete your total side case refresh. Pair this item with our smaller Stainless Steel TDC Inspection Plug to make sure all your generator hardware is completely corrosion-proof.

🔧 Install Tips

  • Visual Demonstration: We have uploaded a detailed clip showing this exact component in use directly within the picture gallery above for quick reference.
  • Swap and Go: Simply unbolt the original soft cap, verify or swap over the sealing rubber ring, and wind your replacement stainless piece home. A quick maintenance win.
  • Manufacturer Reference Cross-Match: Directly replaces factory reference records 09259-2601503S and 09259-26015121.
📧 QUESTIONS? Not sure if this cap lines up with your generator casing? Email us with your model details or if you want feedback from your club peers, head straight to the forums.

Additional information

Weight 0.6 kg
Dimensions 5 × 5 × 5 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.