Vertex Piston Kit Cast Replica 23429CD — KTM / Husqvarna / Gas Gas 50cc 2009-2024

Vertex Piston Kit Cast Replica 23429CD — KTM / Husqvarna / Gas Gas 50cc 2009-2024

Product Description

The Vertex Piston Kit restores factory compression and cylinder sealing on your 50cc 2-stroke mini racer. Engineered as a direct replacement layout for stock setups, this gravity-cast aluminum alloy assembly features an 18% silicone concentration. This specialized alloy architecture drastically minimizes thermal growth during aggressive operation, allowing tighter tolerances within a standard 39.50 mm cylinder bore while preventing cold-seizures on the track.

Every 23429CD structural casting undergoes a precise T-5 thermal hardening and tempering cycle to maximize fatigue resistance. The exterior piston skirt is treated with an anti-friction Molybdenum Disulphite surface layer to decrease initial break-in duration and lengthen total piston life cycle. This standard-compression replacement package delivers crucial top-end restoration components, bundling the 39.47 mm piston together with high-tensile rings, a precision wrist pin, and robust retaining circlips.

Top Features: Vertex Piston Kit

• Gravity-cast aluminum design fortified with an 18% silicone structure to control heat expansion and stabilize ring alignment.
• Hardened utilizing a thorough T-5 thermal tempering routine to bolster rigidity under demanding mini-motocross race settings.
• Coated with a Molybdenum Disulphite compound finish across the skirt area to optimize mating and minimize friction.
• Includes the replica piston body, matching ring set, hardened wrist pin, and dual circlips for an efficient top-end refresh.

Verify your machine parameters against our application data index below to ensure proper cylinder installation prior to ordering.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2021-2024	Gas Gas	MC 50
2018-2019	Husqvarna	TC 50 Mini
2017-2024	Husqvarna	TC 50
2011-2014	KTM	50 SXS
2009-2024	KTM	50 SX
2009-2023	KTM	50 SX Mini
2009	KTM	50 SX Pro Junior

Frequently Asked Questions

Q: Does this kit include the top end gaskets or a wrist pin bearing?
A: No, this is a standard piston kit containing the piston, rings, wrist pin, and circlips. Gaskets and the small-end needle bearing must be sourced separately to finish the engine assembly.

Q: What size cylinder is this 39.47 mm piston kit intended for?
A: This kit is engineered for a standard-bore 39.50 mm cylinder layout, maintaining stock 50cc engine displacement variables.

Expert Pro-Tip: The 50cc automatic engines run at extreme temperatures due to clutch stall adjustments and continuous high RPM load. When installing the piston rings onto the 39.47 mm cast body, be mindful not to over-flex the ring structure, which causes microscopic fracturing. Always align the ring end gaps perfectly with the anti-snag pins in the ring grooves before pushing the assembly into the cylinder block, and always use fresh top-end base and head seals during maintenance.

Recommended Pairings:

• KTM 50 SX Performance Parts & Upgrades
• Husqvarna TC 50 Performance Parts
• Gas Gas 2-Stroke Performance Parts

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