Original Yamaha NMAX 125 Crankshaft Assembly (BV4-E1400-30) | 2015-2020

Sale price£120.95 GBP

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


Engine internals are under constant load, so strength and precision are essential. This original Yamaha NMAX 125 crankshaft assembly (BV4-E1400-30) is built to original Yamaha specifications to deliver reliable performance and long-term durability. It ensures a precise fit and stable operation within the engine. Replacing a worn crankshaft not only restores smooth running but also helps prevent further internal wear and potential damage.

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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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
  • BV4-E1400-30
Alternative Part Number

_

  • BV4-E1400-10, 2DS-E1400-20
Model
  • GPD125-A NMAX
Year
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
MFG
  • Yamaha

Product Overview

This high-quality Original Crankshaft Assy is designed to meet or exceed factory performance standards and is suitable for Yamaha NMAX 125 2015-2020 models.

The Crankshaft Assy is the central rotating component of the engine, converting the reciprocating motion of the piston into rotational power delivered to the transmission. A worn, damaged or seized crankshaft causes severe engine vibration, loss of power, unusual knocking noises and in severe cases complete engine failure. This original replacement is manufactured to original factory specifications, ensuring correct fitment and restoring engine rotation and reliable power delivery.

- Brand New Original Crankshaft Assy
- Part Number: BV4-E1400-30
- Alternative Part Numbers: BV4-E1400-10, 2DS-E1400-20
- Original replacement for Yamaha NMAX 125 (2015-2020)
- Restores correct engine rotation and reliable power delivery
- Eliminates vibration, knocking and power loss caused by a worn or damaged crankshaft
- Ensures correct fitment with the engine block and rotating assembly
- Essential for engine bottom-end rebuild or overhaul
- Bolt-on replacement, no modification required
- 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 experiencing engine vibration, knocking or power loss
• Replacing a worn, damaged or seized Crankshaft Assy
• Mechanics and workshops carrying out Yamaha NMAX 125 engine bottom-end rebuilds or overhauls
• Riders wanting to restore correct engine operation and reliable power delivery
• Anyone sourcing a guaranteed original replacement for the Yamaha NMAX 125

Complete Part Guide

This is where power comes to life. The original Yamaha NMAX125 Crankshaft Assembly (BV4-E1400-30) for 2015-2020 models sits at the heart of the engine, turning combustion into smooth, usable motion that drives the bike forward. Every rotation matters, and this component keeps it balanced, controlled, and efficient. Built to Yamaha's original standard, it delivers precision alignment, flawless rotation, and dependable long-term performance. Available now from Part Hive's London hub, order before 1 PM for same-day UK dispatch.

One issue we see quite often is the engine just not feeling right, slightly rough, lacking response, and not as smooth as it should be. More often than not, this comes down to uneven crank rotation caused by wear in the journals or bearings. It's something we pick up regularly during diagnostics, especially on daily-use NMAX-125 scooters. Riders tend to chase fuel or ignition faults first, but the root of the problem usually sits in the rotating assembly. We fit the correct original Yamaha crankshaft assembly, and it brings everything back into line, smooth rotation, consistent power delivery, and a proper factory-level fit.

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