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CP Piston Kit

CP Piston Kit

Regular price $340.00 USD
Regular price Sale price $340.00 USD
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CP Piston Kit

Kit includes CP-Piston, Piston Pin, Pin Clips, and CPN Rings.
Backordered piston kits generally have a lead time of 5-6 weeks but may vary depending on CP-Carrillo work load.

11.5:1 Compression Ratio w/ 47.6cc Chamber
Valve Pocket Diameter 40.64mm Intake & 34.544mm Exhaust
Valve Pocket Depth 4.445mm Intake & 4.953mm Exhaust

97mm is offered for both cast iron and aluminum bore
102mm are designed for an aluminum bore.
98mm, 99mm, 100mm, and 103.1mm are designed for cast iron bore.

*Pistons made for aluminum bores may be use in cast iron but will result in premature wear and alter ring gap and potential seal.


X-Forgings are designed to minimize friction and reduce weight without compromising strength. They have the side of the piston forged and their pin bosses moved inward toward the center, allowing the use of a shorter wristpin. With the use of different strut angles and bracing, an X-Forging is configured by adjusting the weight balance between high and low stress areas.

CPN Ring Set

  • Small bore and Sport Compact engines with higher cylinder pressure require better sealing power than most other applications.
  • CPN ring sets are designed to meet those high demands.
  • Compatible with today's new cylinder materials, such as Nikasil, these high strength, low tension ring sets offer optimum sealing with minimum drag.
  • Each set consists of a gas nitrided steel 1.0mm top ring, a Taper hook groove (THG) Napier style 1.2mm second ring with a low tension 2.8mm flex vent oil ring. 2.0mm rings are available in the PDN2 ring sets.

Optional DLC Pin

  • Enhanced surface hardiness
  • Improved surface quality
  • Low friction coefficient
  • 100% Rockwell Tested
  • 1 Micron surface finish
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s with 3 stages of I.D. honing
  • Weight tolerances +/- 1 gram
  • Precision ground ends with I.D. radius
  • Cryogenically treated (subzeroheat-treating process) for
    improved material strength and grain structure

* Note: These pistons are not recommended for engines you intend to kick start.