Original Yamaha NMAX 125 Inlet & Exhaust Valve Set (BK6-E2111-00, BK6-E2121-00) | 2020–2025

Sale price£52.50 GBP

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


Proper airflow is essential for the engine to run at its best. This original Yamaha NMAX 125 inlet and exhaust valve set (BK6-E2111-00, BK6-E2121-00) helps restore balanced airflow, strong compression, and smooth overall operation. Built to Yamaha’s factory specifications, it ensures precise fitment and reliable long-term performance. When valves wear, performance can drop off; replacing them brings the engine back to proper running condition.

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 Yamaha GPD125-A NMAX or free returns.

Product Compatibility

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Part Number
  • BK6-E2111-00, BK6-E2121-00
Alternative Part Number

_

Model
  • GPD125-A NMAX
Year
  • 2021
  • 2022
  • 2023
  • 2024
  • 2025
MFG
  • Yamaha

Product Overview

This high-quality Original Inlet & Exhaust Valve Set is designed to meet or exceed factory performance standards and is suitable for Yamaha NMAX 125 (2020-2025), YZF-R125 (2019-2025), MT-125 (2020-2025), Tricity 125 (2021-2025), and XMAX 125 (2021-2025) models.

The Inlet & Exhaust Valve Set provides a complete set of precision-ground inlet and exhaust poppet valves for the cylinder head. The inlet valves open to allow the air-fuel mixture into the combustion chamber, while the exhaust valves open to expel burnt gases. When valves wear, develop pitting, burning, or recession beyond their service limit, compression drops, the engine develops a rough idle, loses power, and fuel consumption increases. This original replacement is manufactured to original factory specifications, restoring reliable performance to your Yamaha motorcycles and scooters.

• Brand New Original Inlet & Exhaust Valve Set
• Part Numbers: BK6-E2111-00 (Inlet x2), BK6-E2121-00 (Exhaust x2)
• Original replacement set for Yamaha NMAX 125 (2020-2025), YZF-R125 (2019-2025), MT-125 (2020-2025), Tricity 125 (2021-2025), and XMAX 125 (2021-2025)
• Enables a complete cylinder head valve renewal in a single kit
• Restores correct intake and exhaust port sealing and engine compression
• Restores full power output, smooth idle, and fuel efficiency
• Direct fit, no modification required
• Recommended for replacement during engine top-end overhaul or full valve 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, YZF-R125, MT-125, Tricity 125, and XMAX 125 owners with low compression, rough idle, or power loss requiring a complete valve replacement
• Replacing the Inlet & Exhaust Valve Set during engine top-end overhaul or full valve service
• Mechanics and workshops carrying out Yamaha engine cylinder head servicing
• Riders wanting to restore the original engine compression and performance of their Yamaha motorcycles and scooters
• Anyone looking for a guaranteed original replacement for their Yamaha NMAX 125, YZF-R125, MT-125, Tricity 125, or XMAX 125

Complete Part Guide

An engine only runs as well as it can breathe. The original Yamaha NMAX125 inlet and exhaust valve set (BK6-E2111-00, BK6-E2121-00), designed for 2020–2025 models, keeps intake and exhaust flow smooth, helping combustion stay clean and efficient. It allows the engine to run consistently and under control through every cycle. Built to Yamaha’s original standards, it delivers precise timing, secure sealing, and dependable performance. In stock at Part Hive's London hub, order before 1 PM for same-day UK dispatch.

These parts are in constant motion, so wear builds up over time. One of the most common issues we see is a gradual loss of efficiency on the NMAX-125, usually due to the valves no longer sealing properly. This often comes from repeated heat cycles, carbon build-up, and general long-term use. It’s something we come across regularly during engine strip-downs. Riders might not notice it straight away, but performance slowly starts to drop off. We replace it with the correct original Yamaha inlet and exhaust valve set and it restores proper sealing, smooth operation, and a precise factory fit that brings everything back to how it should run.

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