TSP Top End Rebuild Kit – Yamaha YZ and YZX 125cc

Everything you need to rebuild the top end on your 2006+ Yamaha YZ/YZX 125cc.


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SKU: PISTONKIT-TSP-125YZ Category: Tags: ,


This TSP top end rebuild kit fits Yamaha YZ125 models from 2006-2021, and YZ125X models from 2006 to current 2022 models. Images shows the parts you will receive.

It includes:

  • Piston kit in size B.   (A piston kits available through special order) Piston kit includes rings, pin, clips and a high quality cast piston with anti-friction coating. These pistons are made by Meteor in Italy and are THE BEST available.
  • Top end gasket kit. Made in Italy and packed especially for TSP. Includes a selection of base gaskets, power valve cover gaskets, copper washers and O rings… all O rings are the correct size and made from the correct material, unlike the cheaper aftermarket kits.
  • Pro X little end bearing

TSP rebuild kits are put together by TSP using parts sourced direct from OEM manufacturers in Japan and Europe. The parts we select are THE BEST available for each make/model and many are the exact same parts as the genuine OEM items.

Piston sizing: ideally you should measure your bore with a dial gauge to work out the correct piston sizing. If you cannot do this then a rough rule of thumb is use an A size under 50 hours of engine run time and use a B size over 50 hours of engine run time.


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Below are the make(s) and model(s) that will fit this part.

Year Make Engine CC Model
Year Make Engine CC Model
2006 Yamaha 125 YZ
2006 Yamaha 125 YZX
2007 Yamaha 125 YZ
2007 Yamaha 125 YZX
2008 Yamaha 125 YZ
2008 Yamaha 125 YZX
2009 Yamaha 125 YZ
2009 Yamaha 125 YZX
2010 Yamaha 125 YZ
2010 Yamaha 125 YZX
2011 Yamaha 125 YZ
2011 Yamaha 125 YZX
2012 Yamaha 125 YZ
2012 Yamaha 125 YZX
2013 Yamaha 125 YZ
2013 Yamaha 125 YZX
2014 Yamaha 125 YZ
2014 Yamaha 125 YZX
2015 Yamaha 125 YZ
2015 Yamaha 125 YZX
2016 Yamaha 125 YZ
2016 Yamaha 125 YZX
2017 Yamaha 125 YZ
2017 Yamaha 125 YZX
2018 Yamaha 125 YZ
2018 Yamaha 125 YZX
2019 Yamaha 125 YZ
2019 Yamaha 125 YZX
2020 Yamaha 125 YZ
2020 Yamaha 125 YZX
2021 Yamaha 125 YZ
2021 Yamaha 125 YZX
2022 Yamaha 125 YZX

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