Vertex Forged Replica Piston Kit - Yamaha YZ250F (16-18), WR250F & YZ250FX (18-19)

Product Description

When it’s time to refresh your high-rpm 4-stroke powerplant, drop-in reliability and factory-spec dimensions are critical to maintaining peak performance. The Vertex Forged Replica Piston Kit delivers an exceptional OE-style replacement engineered to restore your machine's original compression and sharp throttle response. This premium kit takes the guesswork out of top-end overhauls by packaging a precision-machined piston with all necessary hardware in one race-ready assembly.

Manufactured to strict standards, this piston is forged from high-grade 2618 aluminum alloy for unmatched structural strength and long-term durability under intense track and trail conditions. It features a specialized high-tech Molybdenum Disulphite (MoS2) skirt coating to guarantee faster break-in times and significantly minimize friction. Built to deliver standard 13.5:1 compression, Moto-House MX provides this professional-grade kit to keep your machine pulling hard toward the podium. Upgrade your top end today!

Top Features: Vertex Forged Replica Piston Kit

• Forged 2618 Aluminum Construction: Forged from heavy-duty 2618 aluminum alloy to offer superior structural integrity, resilience, and extended piston life compared to cast alternatives.
• Advanced Skirt Coating: Features a high-tech Molybdenum Disulphite coating applied to the piston skirts for reduced friction, faster break-in times, and scuff protection.
• T-5 Hardening Cycle: Every piston undergoes a meticulous T-5 hardening and tempering thermal cycle to maximize structural strength and durability under extreme heat.
• True OEM Specifications: Engineered as a premium OE replica matching the standard 77mm cylinder bore, standard 13.5:1 compression ratio, and precise 76.950mm piston diameter.
• Complete 4-Stroke Setup: Includes the premium forged piston, a complete set of four-stroke rings, a high-strength wrist pin, and secure circlips for a hassle-free installation.

Don't let a tired top end cost you holeshots—verify your fitment below and refresh your machine's performance today!

Fitment List

Year Range	Vehicle Brand	Vehicle Model
2016-2018	Yamaha	YZ 250 F
2017-2019	Yamaha	YZ 250 FX
2018-2019	Yamaha	WR 250 F

Frequently Asked Questions

Q: Is this a forged or a cast piston kit?
A: This specific kit features a Forged Replica piston machined from high-strength 2618 aluminum, providing superior durability over standard gravity-cast alternatives.

Q: Does this piston increase the bike's stock compression ratio?
A: No. This is a Replica series piston engineered to match your bike's original factory compression ratio of 13.5:1, making it a reliable, direct drop-in replacement.

Q: Are the piston rings sold separately or included in this kit?
A: For this four-stroke kit, a complete matched set of high-quality piston rings is included in the box along with the piston, wrist pin, and circlips.

Expert Pro-Tip: Before installation, use a gap gauge to verify your ring end-gap matches factory service manual tolerances inside your cleaned cylinder. Be sure to orient the "Y" or top markings on the compression rings upward, and generously lube the wrist pin with fresh engine oil prior to assembly.

Recommended Pairings:

• Shop Yamaha 250F Series Top End Gaskets & Seals
• Browse Premium 4-Stroke High-Performance Oils
• Browse All Vertex Engine Components

Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida.