ATHENA Racing High Compression Forged Piston for KTM SX 450, SXF 450, XCF 450 2007-2018

ATHENA offers this piston kit for KTM SX 450, SXF 450, XCF 450 2007-2018. 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 KTM XCF 450?

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 30 h in hard use and every 60 h for leisure.

Specifications and fitting tips

• Engine: 4-stroke
• Manufacturer part numbers: S4F09700015A (A), S4F09700015B (B)

Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore). Diameters: A = 96.96 mm, B = 96.97 mm.

Spare parts and items to plan

• Piston rings : WOSSNER · PROX
• Piston pin : WOSSNER CW19 · WOSSNER CW20
• Piston pin clips : WISECO · MOOSE
• Top-end gasket kit : ATHENA · CENTAURO
• Spark plug : NGK 3521 · NGK 97225
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• 4-stroke engine oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
KTM SX 450 2011
KTM SX 450 2010
KTM SX 450 2009
KTM SXF 450 2012
KTM SXF 450 2011
KTM SXF 450 2010
KTM SXF 450 2009
KTM SXF 450 2008
KTM SXF 450 2007
KTM XCF 450 2018
KTM XCF 450 2016
KTM XCF 450 2015
KTM XCF 450 2014
KTM XCF 450 2013
KTM XCF 450 2012
KTM XCF 450 2011
KTM XCF 450 2010
KTM XCF 450 2009
KTM XCF 450 2008