Original Yamaha NMAX 125 Piston (BK6-E1631-00) | 2015-2024

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Discover the ultimate upgrade for your motorcycle.
Designed with precision engineering, this offers unmatched performance and durability.


The piston is right at the center of how your engine performs. This original Yamaha NMAX 125 piston (BK6-E1631-00) keeps everything moving smoothly and helps deliver steady, reliable power every time you ride. Made to Yamaha's standards, it fits properly and does exactly what it should. If your current piston is worn, replacing it helps bring the engine back to a smooth, efficient state.

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.

Order in the next -- hours -- mins for guaranteed 1 PM Same-Day Dispatch from our London NW10 Hub.
Protect your shift — Back on the road tomorrow.

Guaranteed fitment for Yamaha GPD125-A NMAX or free returns.

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.

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Part Number
  • BK6-E1631-00
Alternative Part Number

_

Model
  • GPD125-A NMAX
Year
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
  • 2021
  • 2022
  • 2023
  • 2024
MFG
  • Yamaha

Product Overview

This high-quality Original Piston is designed to meet or exceed factory performance standards and is suitable for Yamaha NMAX 125 (2015-2024) models.

The Piston is the reciprocating component inside the cylinder that converts combustion pressure into rotary motion via the connecting rod. As the piston skirt wears, develops scuffing, seizure marks, or the ring grooves erode beyond their service limit, compression drops sharply, oil consumption rises, piston slap becomes audible, and engine power output deteriorates. This original replacement is manufactured to original factory specifications, restoring reliable performance to your Yamaha NMAX 125 scooter.

- Brand New Original Piston
- Part Number: BK6-E1631-00
- Original replacement for Yamaha NMAX 125 (2015-2024)
- Restores correct bore-to-piston clearance and engine compression
- Eliminates piston slap and reduces oil consumption caused by piston wear
- Direct fit, no modification required
- Recommended for use during engine top-end rebuild or piston replacement service
- 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.

• Yamaha NMAX 125 owners with a worn piston, low compression, piston slap, or increased oil consumption
• Replacing the Piston during engine top-end rebuild or piston replacement service
• Mechanics and workshops carrying out Yamaha NMAX 125 engine top-end servicing
• Riders wanting to restore the original engine compression and power output of their Yamaha NMAX 125 scooter
• Anyone looking for a guaranteed original replacement for their Yamaha NMAX 125 scooter

Complete Part Guide

Every burst of power starts with controlled movement inside the cylinder. The original Yamaha NMAX125 Piston (BK6-E1631-00) for 2015-2024 models converts combustion energy into mechanical force, keeping the engine running smoothly and efficiently. It plays a central role in maintaining performance across every ride. Built to Yamaha's original standard, it ensures accurate fitment, strong compression, and dependable operation. In stock at Part Hive's London hub, order before 1 PM for same-day UK dispatch.

If the NMAX-125 bike's down on power or using more oil than it should, we always check compression, and the piston is usually behind it. Once it's worn, it won't seal properly in the cylinder. That's down to heat, friction, and miles adding up. We see it all the time on higher-mileage scooters. Riders often chase other faults first, but this is a big one. We replace the correct original Yamaha piston and it sorts it, good sealing again, proper compression, and everything sitting right in the bore.

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