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

Sale price£120.95 GBP

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Designed with precision engineering, this offers unmatched performance and durability.


The crankshaft is one of the most important parts of the engine, converting movement into usable power. This original Yamaha NMAX 125 crankshaft assembly (BV4-E1400-10) ensures smooth rotation and stable performance. Built to original Yamaha specs, it provides precise fitment and reliable long-term operation.

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

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Part Number
  • BV4-E1400-10
Alternative Part Number

_

  • BV4-E1400-30, 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-E1400-10
• Alternative Part Numbers: BV4-E1400-30, 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
• Direct fit, 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
• Those seeking a guaranteed original replacement for the Yamaha NMAX 125

Complete Part Guide

Poor lubrication can torch the crankshaft and bearings, and the original Yamaha NMAX125 Crankshaft Assembly (BV4-E1400-10) for 2015-2020 models is designed to fully restore that core rotating assembly. When oil flow is insufficient, bearing surfaces degrade, affecting rotation and engine balance. This component replaces worn internals with a precisely engineered assembly, restoring smooth motion and reliable performance. Built to Yamaha's original specifications, it ensures exact fitment and long-term durability under load. In stock now at Part Hive's London hub, order before 1 PM for same-day UK dispatch.

When everything feels off in the engine, we look at the core first. Typically, a worn crankshaft affects how power is transferred throughout the system. In the workshop, we see this during full rebuilds where multiple symptoms point to the same root cause. Riders may try smaller fixes, but the issue stays. We replace it with this original Yamaha NMAX-125 crankshaft assembly and it restores full system balance, ensures tight and accurate fitment, and resets engine performance.

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