Name: Engine Cam Chain Tensioner Gasket - GT125 GV250 GT250 GV125
SKU: 12837HP7600
Availability: InStock

Engine Cam Chain Tensioner Gasket – GT125 GV250 GT250 GV125

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

Price range: £3.99 through £5.99

💎 CAM CHAIN TENSIONER GASKET | STOP RATTLES & OIL LEAKS

Maintain Timing Integrity: Essential seal when servicing noisy tensioners. This critical paper gasket must be replaced every time you access the CCT. Ensure silent running and stop oil seepage immediately.

✅ Function: Prevents oil pressure loss at the tensioner unit.
🛠️ Maintenance Must: Single-use item; always replace when removed.
⚙️ Compatibility: Available for both Early (Small Hole) & Late (Big Hole) versions.
📦 What’s Included: 1x CCT Gasket (Paper Type).

💡 CRITICAL CHOICE: Hyosung used two versions! You MUST visually check which tensioner you have installed before ordering using the guide below.

BIG HOLE GASKET (Narrow Head Tensioner)	SMALL HOLE GASKET (Alien Head Tensioner)

Description

The Cam Chain Tensioner (CCT) gasket is a small but vital component in your Hyosung engine’s top end. It ensures correct oil pressure delivery to the tensioner mechanism, preventing the dreaded “engine rattle” caused by a loose cam chain. This paper-type gasket should be replaced any time the tensioner is removed for cleaning, replacement, or during a full engine service.

💎 Stop Engine Rattles with the Right Seal

Ensure perfect timing integrity and prevent oil leaks with the correct specification gasket.

Oil Pressure Seal Ensures correct CCT function.	OEM Reference Refs: 12837HP7600/H31321.
Single Use Item Always replace when removed.	Perfect Fit Stops messy oil leaks instantly.

📜 Confirmed Fitment Guide

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

📸 Visual Guide: Which Gasket Do I Need?

Hyosung changed the tensioner design around 2006, and sometimes older bikes have newer parts fitted. Please use the images below to confirm which physical tensioner you have on your bike *before* ordering.

If your bike uses a narrow head tensioner, then select the BIG HOLE gasket	If your bike uses an alien head tensioner, then select SMALL HOLE gasket

🔧 Install Tips

Clean Surfaces: Ensure the mounting surface on the cylinder head is perfectly clean and dry before fitting the new gasket.
Single Use: This paper gasket compresses when installed and cannot be re-used if removed again.
Orientation: The gasket can only fit one way around, matching the oil passage holes correctly.

📧 FITMENT QUESTIONS? Email us a photo of your current tensioner!
For technical help or community opinions on noisy CCTs, visit the HyoRiders Forums.