




Aftermarket Honda PCX 125 Complete Cylinder Barrel Piston Ring Kit (12100-K1Z-T00) | 2021-2025
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-honed cylinder walls and a high-silicon aluminum piston, this Honda PCX 125 aftermarket Complete Cylinder Barrel Piston Ring Kit (12100-K1Z-T00) for 2021-2025 models eliminates compression loss and restores factory power. Designed to withstand the high thermal loads of liquid-cooled eSP+ engines, it ensures secure performance for heavy-duty daily commuting.
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.
- 12100-K1Z-T00
_
- 12100-K40-A00
- PCX125
- 2021
- 2022
- 2023
- 2024
- 2025
- Honda
- 125
- A
- PCX125
- NEW
Product Overview
This high-quality Aftermarket Complete Cylinder Barrel Piston Ring Kit is designed to meet or exceed factory performance standards and is suitable for Honda PCX125 (2021-2025) models.
The Complete Cylinder Barrel Piston Ring Kit supplies the core top-end components, a factory-bored cylinder barrel together with a matched piston and ring set, that work together to contain combustion and convert it into crankshaft motion. Over time, cylinder walls glaze or score, piston skirts wear, and rings lose tension, leading to compression loss, blow-by, increased oil consumption, reduced power, and smoky running. This aftermarket replacement kit is designed to match the original part, restoring reliable performance to your Honda scooter.
• Brand New Aftermarket Complete Cylinder Barrel Piston Ring Kit
• Part Number: 12100-K1Z-T00
• Alternative Part Number: 12100-K40-A00
• Compatible with Honda PCX125 (2021-2025)
• Restores full cylinder compression, sealing, and combustion efficiency
• Helps reduce blow-by, oil consumption, and power loss from top-end wear
• Direct fit, no modification required
• Recommended for engine top-end overhaul, high-mileage rebuilds, or when compression loss is diagnosed
• 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 compression loss, blow-by, or high oil consumption from a worn top end
• Replacing the Complete Cylinder Barrel Piston Ring Kit during engine top-end overhaul or high-mileage rebuild
• Mechanics and workshops carrying out Honda engine top-end servicing
• Riders wanting to restore the original cylinder compression and engine power of their Honda scooters
• Anyone looking for a quality aftermarket replacement for their Honda scooters
Complete Part Guide
The Honda PCX125 2021-2025 Complete Cylinder Barrel Piston Ring Kit (12100-K1Z-T00) is the essential assembly for restoring your engine's internal compression and oil regulation. Scoring within the cylinder bore or worn piston rings often results in blue exhaust smoke and a noticeable loss of uphill torque. This trade-grade Honda aftermarket replacement kit features a precision-honed cylinder and matched piston set, ensuring the exact thermal dissipation and airtight seal required for peak efficiency. Physically stocked at Part Hive's London warehouse, order before the 1 PM cutoff for same-day UK dispatch.
We often see 2021-2025 Honda PCX-125s in the workshop with "tired" engines that have suffered from glazing or carbon buildup due to high-mileage delivery work. When we strip these eSP+ motors, we find that replacing only the rings is a temporary fix. For a lasting repair, a fresh cylinder wall is essential to ensure the new rings seat correctly. We’ve also noticed a recurring mistake in the trade, installing low-quality, unbranded kits that lack precise cross-hatch honing. Without that correct finish, the rings never bed-in properly, leading to the bike smoking again within weeks. This performance-grade Honda aftermarket kit (12100-K1Z-T00) ensures a smooth, high-compression seal, a reliable choice for replacing worn or seized cylinder assemblies.
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