Original Yamaha NMAX 125 Oil Pump Spring Compression (90501-18576) | 2015-2020

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If your engine is experiencing oil pressure issues, the pump spring is often overlooked. This original Yamaha NMAX 125 oil pump compression spring (90501-18576) restores proper pressure control and reliable lubrication. Designed for accurate fitment and long-term durability, it replaces worn springs with ease. A simple fix that helps maintain engine health and performance.

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
  • 90501-18576
Alternative Part Number

_

Model
  • GPD125-A NMAX
Year
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
MFG
  • Yamaha

Product Overview

This high-quality Original Oil Pump Spring Compression is designed to meet or exceed factory performance standards and is suitable for Yamaha NMAX 125 (2015-2020) models.

The Oil Pump Spring Compression is the pressure relief valve spring within the oil pump assembly. It maintains the correct oil pressure by holding the relief valve closed until a set pressure threshold is reached, at which point it allows excess oil to bypass back to the sump. When the spring weakens or breaks, the relief valve opens prematurely or fails to open correctly, resulting in incorrect oil pressure that can cause inadequate lubrication of engine components or over-pressurization of the oil system. This original replacement is manufactured to original factory specifications, restoring accurate oil pressure regulation in your Yamaha NMAX 125 scooter.

- Brand New Original Oil Pump Spring Compression
- Part Number: 90501-18576
- Original replacement for Yamaha NMAX 125 (2015-2020)
- Maintains the correct oil pressure relief valve setting for accurate oil pressure regulation
- Eliminates incorrect oil pressure caused by a weakened or broken relief valve spring
- Direct fit, no modification required
- Recommended for replacement during oil pump overhaul or when oil pressure irregularities 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 owners with incorrect oil pressure or lubrication issues caused by a weakened or broken oil pump relief valve spring
• Replacing the Oil Pump Spring Compression during oil pump overhaul or engine lubrication system service
• Mechanics and workshops carrying out Yamaha NMAX 125 engine oil pump servicing
• Riders wanting to restore accurate oil pressure regulation in their Yamaha NMAX 125 scooter
• Anyone looking for a guaranteed original replacement for their Yamaha NMAX 125

Complete Part Guide

Stable engine performance depends on stable oil pressure. The original Yamaha NMAX125 Oil Pump Spring Compression (90501-18576) for 2015-2020 models supports the internal balance of the lubrication system, helping maintain consistent oil delivery under varying conditions. Built to Yamaha's original standard, it ensures accurate fitment, reliable tension, and long-term durability. Available from Part Hive's London warehouse, order before 1 PM for same-day UK dispatch.

This is one of those parts that doesn't fail suddenly, it just weakens over time. The spring gradually loses its strength, which affects how oil pressure is regulated inside the engine. In the workshop, we see this quite regularly on NMAX-125 bikes that are used daily. Riders don't always notice until performance starts to feel inconsistent. From experience, it's a gradual but important failure point. We replace it with this original Yamaha oil pump spring compression and it restores correct tension, aligns properly within the assembly, and brings oil pressure back under control.

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