- New
ATHENA Racing Forged Piston for HONDA CR 125 2005-2009
€146.90
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.
ATHENA offers this piston kit for HONDA CR 125 2005-2009. 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 ATHENA?
Athena, the Italian manufacturer founded in 1973, is an original-equipment supplier to manufacturers such as KTM and Ducati: the same standards for your replacement parts.
When should you replace the piston on your HONDA CR 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
- Engine: 2-stroke
- Manufacturer part numbers: S4F05400018A (A), S4F05400018B (B), S4F05400018C (C)
Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore). Diameters: A = 53.95 mm, B = 53.96 mm, C = 53.97 mm.
Spare parts and items to plan
- Piston rings : ATHENA · VERTEX
- Piston pin : WOSSNER · VERTEX
- Piston pin clips : WOSSNER
- Top-end gasket kit : see the selection
- Small end needle bearing : HOT RODS · WOSSNER
- Spark plug : see the selection
- Coolant : LIQUI MOLY 1 L · TWIN AIR
- 2-stroke oil : LIQUI MOLY 1 L · MOTUL 800 1 L
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
HONDA CR 125 2009
HONDA CR 125 2008
HONDA CR 125 2007
HONDA CR 125 2006
HONDA CR 125 2005
S4F05400018A
5 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.
Available in several sizes.
ATHENA Racing Forged Piston for HONDA CR 125 2005-2009
€146.90
Tax Included