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Wiseco Piston Kit 66.40mm for KTM 250 SX 2005-2016 856M06640

Part Number: 09100778
WISECO
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SKU:
09100778
MPN:
856M06640
Condition:
New
Availability:
Ships Same Business Day
Weight:
0.71 LBS
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$205.95
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Description

A worn or stock piston limits your KTM 250's potential—this Wiseco kit restores compression, improves throttle response, and delivers the reliability needed for sustained high-RPM performance. Whether you're chasing lap times or pushing through technical terrain, a quality piston upgrade directly translates to measurable power gains and engine longevity. The included gasket kit eliminates the hassle of sourcing components separately, letting you focus on the rebuild.

  • Bore diameter: 66.40mm
  • Premium aluminum alloy construction
  • CNC-machined for precision fitment
  • Optimized cam profile design
  • Increased compression ratio
  • Complete top-end gasket kit included
  • Bolt-on installation (professional rebuild recommended)
  • Fits KTM 250 SX 2005–2016
  • Manufacturer part number: 856M06640
  • Built for high-RPM durability
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Specs

PISTON MATERIAL:
FORGED
BORE - OVERSIZE:
STANDARD
BORE - OVERSIZE METRIC:
STANDARD
PRODUCT NAME:
PISTON
RIDING STYLE:
STREET
SKIRT COATING:
ARMORGLIDE®
DISPLACEMENT:
249 CC
STROKE LENGTH METRIC:
72.00 MM
BORE SIZE METRIC:
66.40 MM
ENGINE TYPE:
2-STROKE
PISTON MATERIAL:
ALUMINUM ALLOY
RIDING STYLE:
OFF-ROAD
UNITS:
EACH
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Fitment

Fitment for Wiseco Piston Kit 66.40mm for KTM 250 SX 2005-2016 856M06640

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