VERTEX Casted Piston for POLARIS PREDATOR 90, SCRAMBLER 90, SPORTSMAN 90 2001-2015

VERTEX offers this piston kit for POLARIS PREDATOR 90, SCRAMBLER 90, SPORTSMAN 90 2001-2015. 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 cast piston?

A cast piston is made by pouring liquid aluminium into a mould: it is what most manufacturers fit as standard, especially on two-strokes.

• High-silicon alloy: it expands little, is fitted with tight clearance and stays quiet when cold.
• Good wear resistance of the skirt and ring grooves.
• Lower price than a forged piston, for OEM quality in normal use.
• Limit: less tolerant of overheating and highly tuned engines.

Why choose VERTEX?

Vertex has made its pistons in Italy since 1953 and has supplied KTM’s original pistons since 1996: molybdenum-disulphide coated skirt and Japanese rings. Its four-stroke pistons are forged from 2618 alloy.

When should you replace the piston on your POLARIS SPORTSMAN 90?

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 50 h in hard use and every 100 h for leisure.

Specifications and fitting tips

• Material: Aluminium
• Piston compression: Standard
• Oversize Letter: A
• Rings Quantity: Set
• Stroke: 2T
• Manufacturer part number: 23165

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

• 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:
POLARIS PREDATOR 90 2014
POLARIS PREDATOR 90 2013
POLARIS PREDATOR 90 2012
POLARIS PREDATOR 90 2011
POLARIS PREDATOR 90 2010
POLARIS PREDATOR 90 2009
POLARIS PREDATOR 90 2008
POLARIS PREDATOR 90 2007
POLARIS PREDATOR 90 2006
POLARIS PREDATOR 90 2005
POLARIS PREDATOR 90 2004
POLARIS PREDATOR 90 2003
POLARIS PREDATOR 90 2002
POLARIS PREDATOR 90 2001
POLARIS SCRAMBLER 90 2014
POLARIS SCRAMBLER 90 2013
POLARIS SCRAMBLER 90 2012
POLARIS SCRAMBLER 90 2011
POLARIS SCRAMBLER 90 2010
POLARIS SCRAMBLER 90 2009
POLARIS SCRAMBLER 90 2008
POLARIS SCRAMBLER 90 2007
POLARIS SCRAMBLER 90 2006
POLARIS SCRAMBLER 90 2005
POLARIS SCRAMBLER 90 2004
POLARIS SCRAMBLER 90 2003
POLARIS SCRAMBLER 90 2002
POLARIS SCRAMBLER 90 2001
POLARIS SPORTSMAN 90 2015
POLARIS SPORTSMAN 90 2014
POLARIS SPORTSMAN 90 2013
POLARIS SPORTSMAN 90 2012
POLARIS SPORTSMAN 90 2011
POLARIS SPORTSMAN 90 2010
POLARIS SPORTSMAN 90 2009
POLARIS SPORTSMAN 90 2008
POLARIS SPORTSMAN 90 2007
POLARIS SPORTSMAN 90 2006
POLARIS SPORTSMAN 90 2005
POLARIS SPORTSMAN 90 2004
POLARIS SPORTSMAN 90 2003
POLARIS SPORTSMAN 90 2002
POLARIS SPORTSMAN 90 2001