- New
WOSSNER piston kit for YAMAHA YZ 125 from 2005 to 2017
€130.90
Tax Included
The piston moves up and down in the cylinder to turn combustion into motion: this kit replaces it along with its rings, pin and clips. Available in several sizes.
WOSSNER offers this piston kit for YAMAHA YZ 125 from 2005 to 2017. The piston slides in the cylinder and takes the force of the air-fuel combustion, passing it to the connecting rod and crankshaft.
Why choose a forged piston?
Instead of simply being cast, a forged piston is hot-pressed under very high pressure and then machined: its metal is denser and free of air pockets.
- Stronger when hot: it copes better with high revs, overheating and detonation.
- Lighter for the same strength: less stress on the connecting rod and bearings.
- Good to know: depending on the alloy, it expands a little more and is fitted with more clearance; slight noise when cold is normal.
- Why does it cost more? Forging tools, full machining and surface treatments cost more than simple casting.
Why choose WOSSNER?
Wössner has forged its own pistons since 1994: Molykote-coated skirt to reduce friction and ease running-in, kit supplied complete with rings, pin and clips.
When should you replace the piston on your YAMAHA YZ 125?
Harder starting, loss of power, blue smoke, oil consumption or a knock when cold: these are the signs of a tired top end.
No manufacturer hour figure for this model. Cross-Mania guideline: compression check every 20 h in hard use and every 40 h for leisure.
Specifications and fitting tips
Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore).
Cross-Mania tip: Measure the cylinder bore before ordering: the piston must match your cylinder size. Follow the manufacturer's break-in procedure and replace the top-end gaskets at the same time.
Also needed with this part
- Top-end gasket kit : ATHENA 150 · ATHENA
- Spark plug : NGK
- 2-stroke oil : LIQUI MOLY 1 L · LIQUI MOLY 4 L
- Air filter : HIFLO FILTRO · TWIN AIR
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
YAMAHA YZ 125 2017
YAMAHA YZ 125 2016
YAMAHA YZ 125 2015
YAMAHA YZ 125 2014
YAMAHA YZ 125 2013
YAMAHA YZ 125 2012
YAMAHA YZ 125 2011
YAMAHA YZ 125 2010
YAMAHA YZ 125 2009
YAMAHA YZ 125 2008
YAMAHA YZ 125 2007
YAMAHA YZ 125 2006
YAMAHA YZ 125 2005
8160DA
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Specific References
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The piston moves up and down in the cylinder to turn combustion into motion: this kit replaces it along with its rings, pin and clips. Available in several sizes.
WOSSNER piston kit for YAMAHA YZ 125 from 2005 to 2017
€130.90
Tax Included