Original Yamaha NMAX 125 Crankshaft Assembly (B6H-E1400-40) | 2021-2024

Sale price£127.50 GBP

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


At the centre of every smooth-running engine is a properly balanced crankshaft. This original Yamaha NMAX 125 crankshaft assembly (B6H-E1400-40) keeps rotation stable and power transfer consistent. Built to original Yamaha specifications, it fits precisely and performs without compromise.

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.

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Part Number
  • B6H-E1400-40
Alternative Part Number

_

  • B6H-E1400-10, B6H-E1400-20, BAL-E1400-10
Model
  • GPD125-A NMAX
Year
  • 2021
  • 2022
  • 2023
  • 2024
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 / Tricity 125 2021-2024 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: B6H-E1400-40
• Alternative Part Numbers: B6H-E1400-10, B6H-E1400-20, BAL-E1400-10
• Original replacement for Yamaha NMAX 125 / Tricity 125 (2021-2024)
• 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
• Plug-and-play fitment, 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 / Tricity 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 / Tricity 125 engine bottom-end rebuilds or overhauls
• Riders wanting to restore correct engine operation and reliable power delivery
• Those after a guaranteed original replacement for the Yamaha NMAX 125 / Tricity 125

Complete Part Guide

Rough transitions under acceleration or load are often linked to crankshaft wear, and the original Yamaha NMAX125 Crankshaft Assembly (B6H-E1400-40) for 2021-2024 models is designed to correct that core rotational imbalance. As internal tolerances shift, power delivery becomes less consistent. This component restores smooth rotational force and stable load transitions, ensuring reliable performance. Built to Yamaha's original specifications, it delivers precise fitment and long-term durability. Available from Part Hive, order before 1 PM for same-day UK dispatch from our London logistics hub.

Maintaining engine balance is essential for smooth and stable operation, making the crankshaft assembly a critical component. Uneven wear can disrupt dynamic balance, leading to increased vibration. In workshop diagnostics, this is frequently identified during rebuilds. While the effect is noticeable, the underlying cause is not always immediately clear. We install this original Yamaha NMAX-125 crankshaft assembly and it restores proper balance, ensures a precise, secure fit, and maintains consistent engine stability.

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