ATHENA Racing Forged Piston for HM CRE 450, MOTARD 450 and HONDA CRF 450, CRF 450 X, TRX 450 R SPORTRAX ELECTRIC START 2WD

ATHENA offers this piston kit for HM CRE 450, MOTARD 450 and HONDA CRF 450, CRF 450 X, TRX 450 R SPORTRAX ELECTRIC START 2WD, TRX 450 R SPORTRAX KICK START 2WD 2002-2014. 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?

Harder starting, loss of power, blue smoke, oil consumption or a knock when cold: these are the signs of a tired top end.

Recommended hours for a top-end rebuild (manufacturer recommendation for the Honda CRF R / RX / X):

• Racing: every 15 h (about 6 races).
• Leisure: no Honda figure; Cross-Mania guideline: compression check at around 30 h.

Specifications and fitting tips

• Material: Aluminium
• Piston compression: Standard
• Piston type: Forged
• Oversize Letter: A
• Manufacturer part number: S4F09600002A

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 : PROX · MOOSE
• Spark plug : NGK 7764 · NGK 6213
• 2-stroke oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50
• Air filter : TECNIUM · TWIN AIR

Compatibility

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

Fits:
HM CRE 450 2014
HM CRE 450 2013
HM CRE 450 2012
HM CRE 450 2011
HM CRE 450 2010
HM CRE 450 2009
HM CRE 450 2008
HM CRE 450 2007
HM CRE 450 2006
HM CRE 450 2005
HM CRE 450 2004
HM CRE 450 2003
HM MOTARD 450 2013
HM MOTARD 450 2012
HM MOTARD 450 2011
HM MOTARD 450 2010
HM MOTARD 450 2009
HM MOTARD 450 2008
HM MOTARD 450 2007
HM MOTARD 450 2006
HM MOTARD 450 2005
HM MOTARD 450 2004
HM MOTARD 450 2003
HONDA CRF 450 2008
HONDA CRF 450 2007
HONDA CRF 450 2006
HONDA CRF 450 2005
HONDA CRF 450 2004
HONDA CRF 450 2003
HONDA CRF 450 2002
HONDA CRF 450 X 2014
HONDA CRF 450 X 2013
HONDA CRF 450 X 2012
HONDA CRF 450 X 2011
HONDA CRF 450 X 2010
HONDA CRF 450 X 2009
HONDA CRF 450 X 2008
HONDA CRF 450 X 2007
HONDA CRF 450 X 2006
HONDA CRF 450 X 2005
HONDA TRX 450 R SPORTRAX ELECTRIC START 2WD 2008
HONDA TRX 450 R SPORTRAX ELECTRIC START 2WD 2007
HONDA TRX 450 R SPORTRAX ELECTRIC START 2WD 2006
HONDA TRX 450 R SPORTRAX KICK START 2WD 2008
HONDA TRX 450 R SPORTRAX KICK START 2WD 2007
HONDA TRX 450 R SPORTRAX KICK START 2WD 2006