CP Pistons
CP Pistons MX1089 Pro Race Forged Piston Kit for 2019-2021 Yamaha YZ250F 77mm Bore STD 14.3:1 CR
CP Pistons MX1089 Pro Race Forged Piston Kit for 2019-2021 Yamaha YZ250F 77mm Bore STD 14.3:1 CR
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A CP-Carrillo MX forged piston kit for the powersports engine listed under Fitment. MX pistons are a fully boxed design with skirt coating and come with a DLC-coated wrist pin. Bore, oversize and compression ratio are listed under Key Features.
Key Features
- Bore: 77mm
- Size: Standard (STD)
- Compression ratio: 14.3:1
- Stroke: 53.6mm (250cc)
This product is not approved for sale or use in the State of California, or in other states that require a CARB Executive Order (E.O.) number. It is intended for use in states that do not require CARB certification.
Fits These Vehicles
- Fits 2019-2021 Yamaha YZ250F
Confirm the model year, the engine and the part number against your vehicle before ordering.
A product photograph is not yet available for this part number. The listing is described by part number and specification, and both are exact.
CP-Carrillo guarantees the quality of the steel and aluminum, the forging, the heat treatment and the dimensional sizes of its parts. Because CP-Carrillo has no control over engine assembly or modification, no further warranty is expressed or implied, including any warranty of merchantability or fitness for a particular purpose. Custom-built parts are not returnable.
Specifications
- Brand: CP Pistons
- Manufacturer Part Number: MX1089
- Type: Piston Set
- Bore: 77mm
- Compression Ratio: 14.3:1
- Manufacturer Warranty: Materials, forging, heat treatment and dimensions
- Condition: New
Images are for illustrative purposes. The product you receive may differ in finish or packaging from the photograph.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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Manufacturer's Warranty โ CP Pistons
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Manufacturer's Warranty โ CP Pistons
CP-Carrillo guarantees the quality of the steel and aluminum, the forging, the heat treatment and the dimensional sizes of its parts. Because CP-Carrillo has no control over engine assembly or modification, no further warranty is expressed or implied, including any warranty of merchantability or fitness for a particular purpose. Custom-built parts are not returnable.
Warranty terms are set by the manufacturer and may change. Full details and claims are handled directly by CP Pistons. Contact us if you need help with a warranty claim.

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