Aftermarket Honda PCX 125 Spark Plug MR8K9 (31918-K97-T00) | 2018-2020

Aftermarket
Sale price£5.95 GBP
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Discover the ultimate upgrade for your motorcycle.
Designed with precision engineering, this offers unmatched performance and durability.


Engineered for efficient combustion, this Honda aftermarket Spark Plug (31918-K97-T00, MR8K9) for Honda PCX 125 (2018-2020) eliminates ignition lag and restores smooth engine response. Its high-conductivity core is built to withstand intense thermal stress, ensuring reliable starts and consistent power delivery for your daily commute.

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.

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Guaranteed fitment for Honda PCX125 or free returns.

Product Compatibility

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Part Number
  • 31918-K97-T00
Alternative Part Number

_

Model
  • PCX125
Year
  • 2018
  • 2019
  • 2020
MFG
  • Honda

Product Overview

This high-quality Aftermarket Spark Plug MR8K9 (31918-K97-T00) is designed to meet or exceed factory performance standards and is suitable for Honda PCX 125 (2018–2020) models.

The spark plug generates the electrical spark required to ignite the air-fuel mixture inside the engine, supporting smooth combustion, efficient fuel delivery, and reliable everyday performance. Over time, the electrode can wear down while carbon deposits build across the firing tip, weakening spark strength and leading to rough idling, hesitation under acceleration, reduced fuel economy, misfires, and difficult cold starts. This aftermarket replacement is engineered for fit and function, restoring consistent ignition performance, smoother throttle response, and dependable engine operation for your Honda PCX 125.

- Brand New Aftermarket Spark Plug MR8K9
- Part Number: 31918-K97-T00
- Compatible with Honda PCX 125 (2018-2020)
- Restores reliable ignition for smooth and efficient engine performance
- Helps maintain consistent fuel economy, throttle response, and cold-start reliability
- Reduces misfires, rough idling, and hesitation under acceleration
- Engineered for fit and function to match factory ignition specifications
- Direct fit replacement, no modification required
- Recommended replacement during scheduled servicing and routine ignition 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 a worn, fouled, or misfiring spark plug affecting engine performance
• Replacing the Spark Plug MR8K9 (31918-K97-T00) during scheduled servicing or routine maintenance
• Mechanics and workshops carrying out Honda PCX125 engine and ignition system servicing
• Riders wanting to restore smooth ignition performance, fuel efficiency, and reliable cold starts
• Anyone looking for a high-quality aftermarket replacement for their Honda PCX125 ignition system

Complete Part Guide

The spark plug functions as the critical ignition trigger for the Honda PCX125 2018-2020, converting electrical energy into the spark needed for combustion. A fouled or corroded plug results in stuttering acceleration, increased emissions, and frustrating starting issues especially in cold weather. This premium Honda aftermarket spark plug replacement MR8K9 (31918-K97-T00) provides the heat range and durability required for heavy London use. Directly shipped from Part Hive's London warehouse, we provide same-day UK dispatch for all orders before 1 PM.

We frequently see 2018-2020 Honda PCX-125s coming in with erratic idle or sluggish pull-away from lights, often traced to a worn spark plug. Once the electrode erodes or carbon builds up, combustion becomes inconsistent, leading to hesitation and misfires. In damp conditions, degraded plugs can make starting less reliable. This performance-grade, Honda aftermarket MR8K9 (31918-K97-T00) spark plug is the correct specification for these models, with the proper reach and thread pitch to protect the cylinder head. Built to handle the thermal stress of city traffic, fitting a fresh plug helps restore dependable ignition and smoother throttle response during daily commuting.

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