2005 - 2021 Yamaha YZ125 Two-Stroke Cyclepedia Motorcycle Service Manual

This Cyclepedia Press motorcycle service manual provides repair, service and maintenance information for Yamaha YZ125 two-stroke motorcycles. This manual includes detailed step-by-step instructions, black and white photographs, as well as wiring diagrams. All procedures in this manual were performed by an experienced dealer-trained Yamaha technician. 

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Years and Models Covered

• 2005 Yamaha YZ125T
• 2006 Yamaha YZ125V
• 2007 Yamaha YZ125W
• 2008 Yamaha YZ125X
• 2009 Yamaha YZ125Y
• 2010 Yamaha YZ125Z
• 2011 Yamaha YZ125A
• 2012 Yamaha YZ125B
• 2013 Yamaha YZ125D
• 2014 Yamaha YZ125E
• 2015 Yamaha YZ125F
• 2016 Yamaha YZ125G
• 2016 Yamaha YZ125XG
• 2017 Yamaha YZ125H
• 2017 Yamaha YZ125XH
• 2018 Yamaha YZ125J
• 2018 Yamaha YZ125XJ
• 2019 Yamaha YZ125K
• 2019 Yamaha YZ125XK
• 2020 Yamaha YZ125
• 2021 Yamaha YZ125

Table of Contents

• Quick Reference
• Periodic Maintenance
• External Components
• Cooling System
• Engine
• Fuel System
• Final Drive
• Brakes
• Front Suspension
• Rear Suspension
• Steering
• Wheels
• Electrical Systems