Domed Motorcycle Piston with ProLite Technology, 1263cc, Wiseco 4012P8

Manufacturer: Wiseco
Highest quality replacement motorcycle piston with ProLite Technology from industry-leader Wiseco. Includes piston, ring, wrist pin, and circlips. Designed for longest service life and friction reduction.
Manufacturer part number: 4012P8
Availability: Out of stock
Old price: $173.67
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Domed Motorcycle Piston with ProLite Technology, Wiseco 4012P8

Wiseco pistons set the standard with the latest technology in forging, materials, piston design, engineering, and ISO-certified quality.  Wiseco works with top racers and industry-leading engine builders to create highly innovative pistons that are proven to deliver performance and longevity in high-revving, high-horsepower engines.


  • 1x Wiseco ProLite Compression Forged Piston
  • 1x Wiseco Piston Ring Set
  • 1x Wiseco Wrist Pin
  • 1x Wiseco Round Wire Wrist Pin Locks / Circlips (pair)


  • Every Wiseco ProLite piston includes piston, ring, wrist pin, and circlips
  • High performance rings designed for improved bore conformance and compatibility for long service life and friction reduction
  • Forged from proprietary Aerospace-grade materials
  • Hand-deburred to ensure out-of-the-box performance
  • High-strength, lightened, precision-machined wrist pins for heavy engine loads and reduced reciprocating weight
  • Precision ring grooves optimize ring and provide longevity ride after ride
  • Manufactured with the latest CNC equipment and techniques allowing proper clearances in critical areas


  • Displacement: 1263cc
  • Bore: 3.517 in
  • Stroke: 3.698 in
  • Dome Volume: +52.0cc
  • Compression Ratio: 9:1
  • Piston Material: Forged aluminum
  • Wrist Pin Style: Floating
  • Top Ring Material: Cast iron
  • Intake Pocket Diameter: 2.045 in
  • Intake Pocket Depth: 0.087 in
  • Exhaust Pocket Diameter: 1.800 in
  • Exhaust Pocket Depth: 0.089 in


  • 1948-1965 Harley Davidson 1200 FL-FLH 74 Cubic Inch "Panhead"
  • 1966-1977 Harley Davidson 1200 FL-FLH 74 Cubic Inch "Shovelhead"

Wiseco Piston

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