- New
PROX Forged Piston for KTM SMR 450, SX 450, SXF 450 2007-2012
€197.90
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.
PROX offers this piston kit for KTM SMR 450, SX 450, SXF 450 2007-2012. 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 PROX?
ProX has its pistons made in Japan and the USA, with Japanese rings (Riken, TP or NPR) and tolerances at least equal to OEM; most of its four-stroke pistons are forged.
When should you replace the piston on your KTM SXF 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 20 h in hard use and every 40 h for leisure.
Specifications and fitting tips
- Material: Aluminium
- Specificity: Flat Crown with Raised Top / 4 Valve Pockets
- Piston compression: Standard
- Oversize Letter: A
- Rings Quantity: Set
- Forged piston : Ø96.94mm
- Manufacturer part number: 01.6427.A
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 : COMETIC · MOOSE
- Spark plug : NGK 2305 · NGK 4339
- 2-stroke oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50
- Air filter : TWIN AIR · TWIN AIR over-filter for FANTIC, GAS G…
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
KTM SMR 450 2012
KTM SMR 450 2011
KTM SMR 450 2010
KTM SMR 450 2009
KTM SMR 450 2008
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
01.6427.A
5 Items
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.
PROX Forged Piston for KTM SMR 450, SX 450, SXF 450 2007-2012
€197.90
Tax Included