Aftermarket Yamaha NMAX 125 Crankshaft Assembly (BV4-E1400-10) | 2015-2020

Aftermarket
Sale price£34.99 GBP Regular price£43.74 GBP
Save £8.75

Running a Workshop or Delivery Fleet? Unlock Up to 75% Trade Discount.

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


When rebuilding or repairing an engine, precision and reliability are essential. This aftermarket Yamaha NMAX 125 crankshaft assembly (BV4-E1400-10) is engineered as a high-quality aftermarket solution, offering accurate fitment and dependable performance. It matches factory mounting points for straightforward installation and consistent operation. Built to handle daily use, it delivers smooth rotation and reliable power delivery you can trust.

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.

Trademark Disclaimer: All trademarks, brand names, and logos remain the property of their respective owners and are used solely for identification and compatibility purposes. We are an independent retailer and are not affiliated with any authorized dealer or distributor.

Part Number
  • BV4-E1400-10
Alternative Part Number

_

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

Product Overview

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

The Crankshaft Assy is the primary rotating component at the heart of the engine, converting the reciprocating motion of the piston into continuous rotational power that drives the transmission and ultimately propels the NMAX 125. Precision-machined to exacting tolerances, the crankshaft must maintain correct alignment, balance, and bearing clearances throughout its service life. When the crankshaft wears beyond its service limit, big-end or main bearings fail, or the crank is damaged due to oil starvation, severe knock or rumble develops, power drops, excessive vibration occurs, and in extreme cases the engine seizes. This aftermarket replacement is designed to match the original part, restoring reliable performance to your NMAX 125 scooter.

- Brand New Aftermarket Crankshaft Assy
- Part Number: BV4-E1400-10
- Quality aftermarket compatible with NMAX 125 (2015-2020)
- Restores correct crankshaft bearing clearances and rotational balance
- Ensures smooth, vibration-free engine operation and reliable power delivery
- Direct fit, no modification required
- Recommended for replacement during engine bottom-end rebuild or when crankshaft bearing failure is 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 garage, apply now!

• Yamaha NMAX 125 owners with engine knock, rumble, excessive vibration, or crankshaft bearing failure
• Replacing the Crankshaft Assy during engine bottom-end rebuild or crankshaft replacement service
• Mechanics and workshops carrying out Yamaha NMAX 125 engine bottom-end servicing
• Riders wanting to restore the original crankshaft balance and engine reliability of their Yamaha NMAX 125 scooter
• Anyone looking for a quality aftermarket replacement for their Yamaha NMAX 125 scooter

Complete Part Guide

If the engine feels rough, noisy, or unstable, the issue can often start here, because the crankshaft is the central rotating mass that everything bolts to. This aftermarket Yamaha NMAX125 Crankshaft Assembly (BV4-E1400-10) for 2015-2020 models restores proper rotational balance and smooth power delivery from the engine's core. Built as a precision-moulded aftermarket replacement, it's engineered for durability and consistent performance. Installs directly with no modification and lines up with factory mounting points. Available now from Part Hive's London hub, order before 1 PM for same-day UK dispatch.

What we often see is engines struggling more under load, especially at higher speeds. In the workshop, that's usually linked to crankshaft wear or imbalance. It takes constant stress, so precision matters. Riders might overlook it until it becomes more serious. We replace it with this trade-grade aftermarket crankshaft assembly and it is built to handle that stress, maintain balance, and keep the engine running smoothly under real conditions on your NMAX-125.

Get the Right Parts for Your Ride with Part Hive

Finding the perfect part for your motorcycle is easy with Part Hive. Here’s how we make it simple for you:

Wide Selection

From brakes and suspension to mirrors and body fairings, we stock parts for all major motorcycle brands and models.

Easy Fit

Use our filters or search tools to quickly locate parts compatible with your make, model, and year.

Trusted Quality

All our parts are sourced from reliable manufacturers, including high-quality aftermarket options.

Fast Delivery

Order online and get your parts delivered quickly, so you can get back on the road without delay.

Part Hive FAQ

Your Guide to Smooth Rides