- New
AIRSAL Piston for YAMAHA WR 125, WR 125 X and BETA RR 125 2009-2011
€34.55
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.
AIRSAL offers this piston kit for YAMAHA WR 125, WR 125 X and BETA RR 125 2009-2011. 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 AIRSAL?
Airsal, the Spanish two-stroke cylinder specialist since 1986: aluminium cylinder with a nickel-silicon-carbide coating, far more wear-resistant than cast iron.
When should you replace the piston?
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
- Material: Aluminium
- Specificity: T6 (Heat Treatment Process)
- Piston compression: Standard
- Piston type: Forged
- Oversize Letter: A
- Bullet (d x l): 14 x 37 mm.
- Manufacturer part number: 06125852
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
- Spark plug : NGK 3230 · NGK 2707
- 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063
- Air filter : TWIN AIR · TWIN AIR over-filter for FANTIC XE, XX…
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
BETA RR 125 2011
BETA RR 125 2010
YAMAHA WR 125 2010
YAMAHA WR 125 2009
YAMAHA WR 125 X 2010
YAMAHA WR 125 X 2009
06125852
15 Items
Specific References
Click on your bike to see all compatible parts.
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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.
AIRSAL Piston for YAMAHA WR 125, WR 125 X and BETA RR 125 2009-2011
€34.55
Tax Included