
Aftermarket Honda PCX 125 Head Cover Gasket Cylinder Seal (12391-KZR-600) | 2014-2020
Running a Workshop or Delivery Fleet? Unlock Up to 75% Trade Discount.
Discover the ultimate upgrade for your motorcycle.
Designed with precision engineering, this offers unmatched performance and durability.
Built with precision-molded synthetic rubber that locks firmly into the valve cover groove, this Honda PCX 125 aftermarket Head Cover Gasket (12391-KZR-600) for 2014-2020 models eliminates oil weeping and restores a clean engine exterior. Designed to withstand extreme thermal cycling and oil exposure, it ensures secure performance for daily urban riding.
Vetted by our Lead Engineer. Leveraging 30 years of mechanical pedigree, every part is inspected for material density and exact tolerances to ensure a 'Right-First-Time' fit.
Guaranteed fitment for Honda PCX125 or free returns.
Delivery Information
Orders placed before 12:00pm (UK time) are usually dispatched the same working day. Orders placed after this time will be dispatched on the next working day.
In the rare event of a stock shortage, we will notify you promptly and issue a full refund within one working day if the item cannot be supplied.
Once dispatched, tracking information will be provided via email, provided valid contact details are supplied at checkout.
While we aim to meet all estimated delivery times, delays may occasionally occur due to circumstances beyond our control, such as courier issues, weather conditions, or operational disruptions. Should this happen, we will keep you informed.
Delivery Areas
We currently deliver to:
• United Kingdom
• Republic of Ireland
• Isle of Man
• Jersey & Channel Islands
• Most European destinations
If you are unsure whether we deliver to your location, please contact us prior to placing your order.
Verified UK Entity #15361806 operating from our NW10 London Logistics Hub. Skip the wait with express workshop pickup.

Product Compatibility
Compatibility charts are for reference only. Please compare part numbers and manufacturers' details. Contact us before ordering if unsure to avoid delays or refund charges.
Trademark Disclaimer: All trademarks, brand names, and logos remain the property of their respective owners and are used solely for identification and compatibility purposes. We are an independent retailer and are not affiliated with any authorized dealer or distributor.
- 12391-KZR-600
_
- PCX125
- 2014
- 2015
- 2016
- 2017
- 2018
- 2019
- 2020
- Honda
- 125
- A
- PCX125
- NEW
Product Overview
This high-quality Head Cover Gasket Cylinder Seal is designed to meet or exceed factory performance standards and is suitable for Honda PCX125 (2014-2020) models.
The head cover gasket cylinder seal forms the oil-tight barrier between the cylinder head cover and the cylinder head, preventing engine oil from leaking out around the top of the engine. As the gasket ages, the rubber or composite material hardens, compresses permanently, or develops cracks, allowing oil to seep from the joint and accumulate on the engine casing, exhaust, and surrounding components, creating a fire risk and potentially masking other faults. This quality aftermarket replacement is built to match original specifications, restoring a reliable oil-tight head cover seal to your PCX125.
• Brand New Aftermarket Head Cover Gasket Cylinder Seal
• Part Number: 12391-KZR-600
• Compatible with Honda PCX125 (2014-2020)
• Restores an oil-tight seal between the cylinder head cover and cylinder head
• Prevents oil leaks and contamination of external engine components
• Direct replacement, no modification required
• Recommended for top-end engine service and scheduled cylinder head cover maintenance
• London: Express same-day delivery (2-3 hours)
• Rest of UK: Same-day dispatch on orders before 1 PM (3-4 business days delivery).
• Up to 75% off for B2B Trade Accounts. Independent UK garages, apply now.
• Honda PCX125 owners with an oil-leaking, seeping, or deteriorated head cover gasket
• Replacing the Head Cover Gasket Cylinder Seal during top-end engine service or oil leak repair
• Mechanics and workshops carrying out Honda PCX125 engine servicing or cylinder head work
• Riders wanting to restore a reliable oil-tight head cover seal to their 2014-2020 PCX125
• Anyone looking for a quality aftermarket replacement for their Honda PCX125
Complete Part Guide
The head cover gasket on your Honda PCX125 2014-2020 acts as the primary seal for the top-end valve train, preventing pressurized oil from escaping the cylinder head. If this seal becomes brittle or compressed, you will notice oil trailing down the engine block, which can foul the spark plug lead or drip onto the exhaust. This performance-grade Honda aftermarket replacement (12391-KZR-600) provides the flexible sealing profile and heat resistance needed to protect your bike's top end. Stocked at Part Hive's London warehouse, complete your order before 1 PM for guaranteed same-day UK dispatch.
We frequently see 2014-2020 Honda PCX-125s in the workshop with "messy" engines caused by the 12391-KZR-600 seal flattening out and losing its elasticity after thousands of heat cycles. When diagnosing top-end leaks, we find that a hardened gasket is the leading cause of oil contamination around the ignition system. It’s a recurring mistake to reuse an old, flattened seal with liquid gasket maker, as the excess sealant can break off internally and clog sensitive oil galleries. This heavy-duty, Honda aftermarket gasket ensures a deep, high-pressure seal that won't have you back on the bench within a month, replacing leaking, brittle, or crushed head cover seals.
You may also like
Get the Right Parts for Your Ride with Part Hive
Finding the perfect part for your motorcycle is easy with Part Hive. Here’s how we make it simple for you:
Wide Selection
From brakes and suspension to mirrors and body fairings, we stock parts for all major motorcycle brands and models.
Easy Fit
Use our filters or search tools to quickly locate parts compatible with your make, model, and year.
Trusted Quality
All our parts are sourced from reliable manufacturers, including high-quality aftermarket options.
Fast Delivery
Order online and get your parts delivered quickly, so you can get back on the road without delay.
Part Hive FAQ
Your Guide to Smooth Rides
How do I add a part to my cart?
Simply select the correct part for your motorcycle (make, model, year), then click the ‘Add to Cart’ button. The item will be added to your cart, and you can continue shopping or proceed to checkout.
Can I change the quantity of a part before checkout?
Yes! After adding a part to your cart, you can adjust the quantity directly in your cart page.
What if I accidentally add the wrong part to my cart?
No problem! You can remove any item from your cart by clicking the ‘Remove’ button next to the quantity. You can then add the correct part if needed.
Can I save items in my cart for later?
Yes. Items in your cart are automatically saved for logged-in customers for a limited time. You can also create a Wishlist or favourites list to save items for future purchases.
