
Original Honda PCX 125 Head Gasket Cylinder (12251-KZR-601) | 2012-2020
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Discover the ultimate upgrade for your motorcycle.
Designed with precision engineering, this offers unmatched performance and durability.
The Head Gasket Cylinder (12251-KZR-601) is the original Honda replacement part for Honda PCX 125 (2012-2020). Engineered to withstand extreme combustion pressures and high-temperature coolant flow, this original gasket is critical for preventing head failure and maintaining factory compression levels.
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.
- 12251-KZR-601
_
- 12251-KWN-901, 12252-KWN-900, 12251-K12-901, 12251-K40-F01, 12252-K40-F00
- PCX125
- 2012
- 2013
- 2014
- 2015
- 2016
- 2017
- 2018
- 2019
- 2020
- Honda
- 125
- A
- PCX125
- NEW
Product Overview
This high-quality Original Head Gasket Cylinder is designed to meet or exceed factory performance standards and is suitable for Honda PCX125 (2012-2020) models.
The Head Gasket Cylinder sits between the cylinder head and the cylinder barrel, forming a critical seal that contains combustion pressure and isolates the oil and coolant passages crossing the joint. When the gasket fails from age, overheating, or head disturbance during servicing, compression is lost, oil or coolant leaks appear, and combustion gases can cross-contaminate the oil or coolant passages, leading to overheating and engine damage. This original replacement is manufactured to original factory specifications, restoring reliable performance to your Honda scooter.
- Brand New Original Head Gasket Cylinder
- Part Number: 12251-KZR-601
- Alternative Part Numbers: 12251-KWN-901, 12252-KWN-900, 12251-K12-901, 12251-K40-F01, 12252-K40-F00
- Original replacement for Honda PCX125 (2012-2020)
- Restores a reliable combustion, oil, and coolant seal at the cylinder head joint
- Helps prevent compression loss, oil or coolant leaks, and cross-contamination
- Direct fit, no modification required
- Recommended for replacement whenever the cylinder head is removed or during engine top-end overhaul
- 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 head gasket failure, compression loss, or oil and coolant leaks at the head joint
• Replacing the Head Gasket Cylinder during engine top-end overhaul or cylinder head service
• Mechanics and workshops carrying out Honda cylinder head and top-end servicing
• Riders wanting to restore the original head sealing and combustion integrity of their Honda scooters
• Anyone looking for a guaranteed original replacement for their Honda scooters
Complete Part Guide
The cylinder head gasket on your Honda PCX125 2012-2020 acts as the high-pressure seal between the engine block and the head, containing combustion gases and liquid coolant. If this component fails, you will likely experience overheating, white exhaust smoke, or loss of power due to compression leaks. This original Honda replacement (12251-KZR-601) provides the precise thickness and material composition required for the 2012-2020 liquid-cooled system. In stock at Part Hive's London warehouse, confirm your order before 1 PM for guaranteed same-day UK dispatch.
Coolant disappearing from the reservoir or bubbles in the radiator are classic signs that a 2012-2020 Honda PCX-125 has a breached 12251-KZR-601 gasket. During a teardown, we frequently observe that many overheating issues stem from using single-layer aftermarket gaskets that cannot handle the thermal expansion of the Honda head. It is a major mistake to reuse old head bolts or ignore the mating surface flatness when installing a new seal. This original Honda Head Gasket is manufactured to the exact thickness and material specification needed to restore a permanent, gas-tight seal, replacing blown, leaking, or inferior aftermarket gaskets.
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