

Original Honda PCX 125 Crankcase Gearbox Bearing Radial Ball 6204 (91003-KZR-601) | 2012-2025
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Discover the ultimate upgrade for your motorcycle.
Designed with precision engineering, this offers unmatched performance and durability.
This original Crankcase Gearbox Bearing 6204 (91003-KZR-601) features a precision-machined fit to replace worn or pitted factory bearings in 2012-2025 Honda PCX 125 engines. It ensures quiet operation and reliable mechanical alignment, providing the durability required for consistent performance during daily commuting.
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.
Guaranteed fitment for Honda PCX125 or free returns.
Delivery Information
Orders placed before 12:00pm (UK time) are usually dispatched the same working day. Orders placed after this time will be dispatched on the next working day.
In the rare event of a stock shortage, we will notify you promptly and issue a full refund within one working day if the item cannot be supplied.
Once dispatched, tracking information will be provided via email, provided valid contact details are supplied at checkout.
While we aim to meet all estimated delivery times, delays may occasionally occur due to circumstances beyond our control, such as courier issues, weather conditions, or operational disruptions. Should this happen, we will keep you informed.
Delivery Areas
We currently deliver to:
• United Kingdom
• Republic of Ireland
• Isle of Man
• Jersey & Channel Islands
• Most European destinations
If you are unsure whether we deliver to your location, please contact us prior to placing your order.
Verified UK Entity #15361806 operating from our NW10 London Logistics Hub. Skip the wait with express workshop pickup.

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.
- 91003-KZR-601
_
- 91003-KZR-602, 91003-K1N-V01, HB6204
- PCX125
- 2012
- 2013
- 2014
- 2015
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- Honda
- 125
- PCX125
- NEW
Product Overview
This high-quality Original Crankcase Gearbox Bearing Radial Ball 6204 is designed to meet or exceed factory performance standards and is suitable for Honda PCX 125 (2012-2025) models.
The Crankcase Gearbox Bearing Radial Ball 6204 is a precision radial ball bearing housed within the crankcase gearbox assembly, supporting the gearbox shaft and allowing it to rotate smoothly under the transmission loads generated during normal operation. As the bearing wears, increased internal play and friction cause roughness and noise from the gearbox area, degraded transmission smoothness, and, if not addressed, can accelerate wear on the gearbox shaft and casing. This original replacement is manufactured to original factory specifications, restoring gearbox bearing precision and smooth, reliable transmission operation to your PCX 125.
- Brand New Original Crankcase Gearbox Bearing Radial Ball 6204
- Part Number: 91003-KZR-601
- Alternative Part Numbers: 91003-KZR-602, 91003-K1N-V01, HB6204
- Original replacement for Honda PCX 125 (2012-2025)
- Restores smooth, quiet gearbox operation and reliable transmission performance
- Prevents roughness, noise, and premature wear in the crankcase gearbox assembly
- Direct fit, no modification required
- Recommended for bearing replacement during crankcase and gearbox overhaul
- 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.
• Honda PCX125 owners with a noisy, rough, or vibrating crankcase gearbox bearing
• Replacing the Crankcase Gearbox Bearing Radial Ball 6204 during crankcase or gearbox overhaul and servicing
• Mechanics and workshops carrying out Honda PCX125 engine and transmission servicing
• Riders wanting to restore smooth, quiet gearbox operation to their PCX125
• Anyone looking for a guaranteed original replacement for their Honda PCX125
Complete Part Guide
A failing radial ball bearing on your Honda PCX125 (2021-2025) gives itself away, a metallic whirr or low drone that rises with road speed, not engine rpm. Catch it early and it's a straightforward swap; leave it and the surrounding components start paying the price. Part No. 91003-KZR-601 is the original Honda 6204 radial ball bearing (NTN spec), correct for multiple PCX drivetrain applications, and can easily handle the extreme radial loads of London's stop-start traffic. Physically held at Part Hive's London warehouse; orders confirmed before 1 PM enjoy same-day UK dispatch.
This high-load radial ball bearing (91003-KZR-601) is essential for maintaining the rotational alignment of the final drive gears in Honda PCX-125 models, 2012-2025. We often encounter engines where a persistent metallic drone from the transmission housing indicates that the internal bearing races have become pitted or heat-stressed. In the stop-start environment of North London, the transmission undergoes constant load changes that push standard bearings to their breaking point. This original Crankcase Gearbox Bearing Radial Ball is designed to match the specific hardness and expansion rates of the original engine components, eliminating mechanical vibration and protecting the surrounding gear set from the uneven wear patterns that inevitably lead to total transmission failure.
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