Engine Valve Stem Guide Oil Seal (x4 Seals) – Various Hyosung Models
Stop that smoky exhaust and high oil consumption. These internal seals prevent lubricant from sweeping past the guides into the combustion chambers, curing oil burn issues during everyday travel on local roads.
- Utility // Eliminates blue smoke tailpipe emissions on overrun deceleration and stops spark plugs from oil fouling.
- Hardware // Supplied as a handy 4-pack of seals. Note that V-twin configurations require two packs total for a complete engine refresh.
- Fitment // Broad cross-model integration covering a large variety of classic single and twin-cylinder cylinder heads.
- Aftermarket // High-quality matching component engineered to withstand severe cylinder head thermal thresholds perfectly.
Description
Over extended operating periods, constant cylinder head heat cycles naturally harden the original rubber composition of your valve stem oil seals, stopping them from seating tightly against the shafts. This loss of elasticity lets engine oil slip past the valve guides to burn up directly inside the combustion chambers, generating blue exhaust smoke and reducing efficiency. Fitting fresh high-quality seals is highly useful when completing a top-end tear down to make sure your mechanical labor yields reliable results on everyday roads.
💎 CYLINDER HEAD VALVETRAIN SPECIFICATIONS
| Stops Exhaust SmokingClears up internal fluid contamination to ensure compliance with emissions inspections. | Reduces Sump LossRetains engine oil properly inside your primary lubricating channels instead of wasting it. |
| Full Head Pack GroupContains four exact units to overhaul one whole multi-valve head casting cleanly. | Broad Compatibility RangeFits across a wide array of single-cylinder and twin-cylinder motor configurations. |
📜 Confirmed Fitment Guide
Classic Generation Engine Group: Drop-in component compatibility verified for the traditional head profiles listed below up to approx 2017 production years.
- GT Sport & Naked: GT125, GT125R, GT125RC, GT250, GT250R, GT650, and GT650R lines.
- GV Cruiser Series: GV125C, GV250, and GV650 Aquila v-twin models alongside ST7 touring machines.
- Single Cylinder Layouts: RT125, RX125, GD250N, and GD250R motorcycles.
- Modern EFI Generations: Reworked post-2019 versions such as the GV125S Aquila Bobber, GV300S, or GV250DRA utilize completely alternative valve guide specifications.
🔧 Install Tips
- Dual Pack Requirements: Keep your engine cylinder layout in mind. You need eight individual seals total to fully overhaul a complete v-twin engine block configuration (four components per head assembly). Please order two packs if doing both cylinders.
- Sump Level Fluid Check: When managing your rebuild, always inspect your total oil volumes via the integrated crankcase sight glass with the frame balanced perfectly upright on a paddock stand for accurate readings.
- Technical Skill Utility: Please note that no mechanical instructions are bundled in this kit. Internal valvetrain work is best suited for experienced home builders or professional engine shops.
- Manufacturer Reference Cross-Match: Swaps precisely with factory replacement index markers 09289H04002 and 09289H04003.
Additional information
| Weight | 0.5 kg |
|---|---|
| Dimensions | 10 × 10 × 2 cm |
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GARAGE PICKS // ADD TO BUILD
-
Japan D.I.D Cam Shaft Chain – Hyosung GT250 GV250 RX125 RT125
£79.99 -
Complete Stainless Steel Engine Bolt Kit – Hyosung GT GT125R GV125 GT250R GV250
Price range: £18.00 through £21.00 -
Oil Filter Service Kit & O-Rings – Hyosung GV125 GT125R GT125 GV250 GT250
£9.99 -
Engine CamShaft Timing Cam Chain – Hyosung GT125 GT125R GV125
£65.99
EXPLORE // RELATED PRODUCTS
-
Stainless Steel Carb Inlet Manifold Intake Clamp x2 – Hyosung GV250 GT125R GV125 GT250
£7.99 -
Japan Front Rear Wheel & Sprocket Bearing Kit – Hyosung GV GT 125 250 650 & ST7
£33.99 -
Engine Front Sprocket Washer Safety Lock – Hyosung GV125 GT250 GT125R RX125 GV250
£7.99 -
Heavy Duty Clutch Springs Set [x5] – Hyosung GV125 GT125 GT125R
£19.99
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.
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