Yamaha YZF R125 Workshop Service Manual

Welcome to the YZF R125 blog we have lots of posts on engine repairs and servicing and maintenance of your R125 .

See our index / contents page here for lots more information 

Buy our new book the Yamaha R125 technical owners bible learn more Here

you free manual link is below .

Whether you are performing a simple oil change or a full engine rebuild, having the official Yamaha Service Manual is essential.

1. Official Service Manuals (The Mechanic's Bible)

• [PDF] Generation 1 Service Manual (2008–2013) – The complete 350+ page workshop guide for the original R125.

• [PDF] Generation 2 Service Manual (2014–2018) – Technical data focusing on the inverted forks and ABS systems.

• [Search] Generation 3 & 4 Workshop Resources (2019–2026) – Since the VVA engine is highly specialized, use the official Yamaha portal to find your specific VIN-matched manual.

2. Quick Reference Owner's Manuals

• 2024–2026 R125 Owner's Manual – Essential for Gen 4 owners to learn the new TFT display and Traction Control settings.

• 2019–2023 R125 VVA Owner's Manual – Guide for the first-generation VVA engine and dash setup.

3. Essential Torque Settings (General Reference)

Component	Torque Spec (Nm)	Notes
Front Axle Bolt	60 Nm	Check fork alignment
Rear Axle Nut	90 Nm	2014+ models with ABS
Oil Drain Bolt	32 Nm	Use new copper washer
Spark Plug	13 Nm	Do not overtighten!
Brake Caliper (Front)	35 Nm	Radial mounts (2014+)

4. Wiring & Electrical Warnings

The electrical systems have changed drastically across generations:

• Gen 1/2: Standard fuse-box setup.

• Gen 3/4: Includes a Communication Control Unit (CCU) for smartphone pairing and Traction Control sensors. Refer only to the 2019+ wiring schematics to avoid damaging the expensive ECU.

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Safety Warning: Always follow the torque specifications listed in the official manual. Failure to properly tighten critical components like brakes or axles can lead to mechanical failure. Wear full protective gear when testing your bike after any major service.

Yamaha YZF R125 Workshop Service Manual Free Download

Yamaha YBR 125 workshop manual 

you can download a copy of the YZF R125 workshop manual from here free

Yamaha YZF R 125 Free Workshop manual 



For a lot more information on how to service and maintain your R125 buy and read the Haynes workshop manual.

                         Yamaha YZF R125 Workshop Manual on Ebay UK