Original Yamaha NMAX 125 Valve Rocker Arm Assembly (BK6-E2160-01) | 2021-2025

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


A properly working rocker arm keeps the engine running smoothly and in sync. This original Yamaha NMAX 125 valve rocker arm assembly (BK6-E2160-01) ensures accurate valve movement and consistent timing across the rev range. Built to Yamaha's factory standards, it fits straight in and operates cleanly without hesitation. If the engine starts to feel slightly out of tune, this helps bring everything back into proper balance.

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-E2160-01
Alternative Part Number

_

  • B6H-E2160-02
Model
  • GPD125-A NMAX
Year
  • 2021
  • 2022
  • 2023
  • 2024
  • 2025
MFG
  • Yamaha

Product Overview

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

The Valve Rocker Arm Assy is a pivoting lever in the engine's valve train that transfers motion from the camshaft lobe to open the valve against its spring. Mounted on the rocker shaft, it converts the camshaft's rotational movement into the linear motion required to operate the valve. When the rocker arm contact pad wears, cracks develop, or the rocker shaft bore becomes loose, valve timing becomes erratic, engine performance drops, a persistent ticking or tapping noise develops, and in severe cases the valve may not open fully, causing significant power loss and rough running. This original replacement is manufactured to original factory specifications, restoring reliable performance to your Yamaha motorcycles and scooters.

- Brand New Original Valve Rocker Arm Assy
- Part Number: BK6-E2160-01
- Alternative Part Number(s): B6H-E2160-02
- Original replacement for Yamaha NMAX 125 (2021-2025), XMAX 125 (2021-2025), MT-125 (2020), YZF-R125 (2019-2025), and R125 (2019-2025)
- Restores correct valve timing and full valve lift
- Ensures quiet, reliable valve train operation and consistent engine performance
- Direct fit, no modification required
- Recommended for replacement during cylinder head overhaul or when valve train noise or performance issues are detected
- 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, XMAX 125, MT-125, and YZF-R125 owners with valve train ticking, tapping noise, or power loss caused by a worn rocker arm
• Replacing the Valve Rocker Arm Assy during cylinder head overhaul or valve train service
• Mechanics and workshops carrying out Yamaha engine valve train servicing
• Riders wanting to restore the original valve timing and engine performance of their Yamaha motorcycles and scooters
• Anyone looking for a guaranteed original replacement for their Yamaha NMAX 125, XMAX 125, MT-125, YZF-R125, or R125

Complete Part Guide

Every valve movement needs to be spot on, and this is the part that makes it happen. The original Yamaha NMAX125 valve rocker arm assembly (BK6-E2160-01), designed for 2021-2025 models, transfers motion from the camshaft to the valves with clean, precise action, keeping timing sharp and performance efficient. It keeps everything working in sync, cycle after cycle. Built to Yamaha's original standards, it offers accurate fitment, smooth operation, and consistent performance under load. Available from Part Hive's London warehouse, order before 1 PM for same-day UK dispatch.

You can tell a lot from how the top end sounds and feels. Common problem we see is that light ticking or roughness that wasn't there before, usually caused by wear at the rocker arm contact points. Over time, that wear affects how cleanly the valves open and close. In workshop checks, this is a frequent find on engines under constant load. Riders often assume it's minor, but it develops further if left. We replace the correct original Yamaha valve rocker arm assembly and it restores smooth contact, reduces friction, and delivers a tight, factory-level fit to your NMAX-125.

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