Name: Engine Piston Barrel Cylinder Base Gasket - GT125 GV250 GT250 GV125
SKU: 11241HG5103
Availability: InStock

Engine Piston Barrel Cylinder Base Gasket – GT125 GV250 GT250 GV125

Estimated delivery dates: Apr 23, 2026 - Apr 24, 2026

£8.99

💎 CYLINDER BASE GASKET | PREVENT OIL LEAKS

Maintain Engine Integrity: Essential seal for any top-end work. This high-quality paper-type gasket provides a perfect seal between the crankcase and cylinder barrel. A vital part for professional engine rebuilds, preventing future oil leaks and performance issues.

✅ Material: Durable Paper Composite (Factory Spec).
🛠️ Function: Seals the crankcase-to-barrel mating surface.
⚙️ Maintenance Must: Must be replaced every time the barrel is removed.
📦 What’s Included: 1x Base Gasket (Single Cylinder Fitment).

💡 REBUILD NOTE: This is a single-use paper gasket. If you are servicing both pistons/barrels on your V-Twin, you need to order two of these gaskets!

In stock

Description

Working on your GT125 or GV250 engine is a core part of keeping these legacy bikes on the road. The cylinder base gasket is a critical, single-use component that ensures a correct seal between your crankcase and the cylinder barrel. Never reuse an old paper gasket or use messy liquid sealants that fail under heat—do the job right and prevent future issues.

💎 Stop Leaks with a Reliable Base Seal

Prevents oil leaks around the bottom of the cylinder, essential for performance and reliability.

Factory Spec Direct replacement part.	OEM Reference Matches 11241HG5103.
Essential Repair Must be replaced if removed.	DIY Friendly Easy for home mechanics.

📜 Confirmed Fitment Guide

✅ FITS: GT125, GT125R, GT250, GT250R (2003-2022 Carb & EFI).
✅ CRUISERS: GV125C & GV250 (1999-2018 Carb & EFI).
❌ WILL NOT FIT: GV125-S EFI (Liquid Cooled), GV300-S, or any 650cc models.

💡 RECOMMENDED PAIRING:
If you are this deep into the engine, you are likely doing a piston replacement. Don’t forget a fresh set of [Piston Rings] to restore full compression!

🔧 Install Tips

Surface Prep: Use a plastic scraper to ensure mating surfaces on the crankcase and barrel are spotless. Do not use metal scrapers.
No Sealant: Install this gasket dry. No RTV or extra silicone is required.
Torque Sequence: Follow your service manual’s specific torque settings and patterns for the cylinder stud nuts.

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