Vertex Top End Rebuild Kit - KTM 125 SX/EXC 16-17 HI PERFORMANCE 53.97MM (V-24243D)

Vertex Top End Rebuild Kit - KTM 125 SX/EXC 16-17 HI PERFORMANCE 53.97MM (V-24243D)

Marsoni

M251S

$179.47

Get it in 3 business days with 1 day shipping. Friday, May 29

Vertex Top End Rebuild Kit - KTM 125 SX/EXC 16-17 HI PERFORMANCE 53.97MM (V-24243D)VERTEX TOP END REBUILD KITS Piston Kit Vertex pistons have an outstanding reputation for quality and performance. Each gravity cast piston is created with only premium aluminium alloys utilizing a 12 21% silicon content. The silicon content in Vertex pistons is crucial to the quality of the piston. Silicon is critical in decreasing thermal expansion which, when an engine reaches normal operating temperatures, can change the geometry of the piston.

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Called around for quotes to get them replaced and everyone was quoting over $2k just for bellows. Figured I’d give it a try. The rubber is good quality and feels soft. Time will tell but this is an easy job if you’re mechanically inclined. Make sure you replace the plastic water pickup fitting while you’re at it. Found mine to be cracked on disassembly and had to wait for a new one. Should be a easy 3-4 hour job if your not doing the bearing and only doing bellows

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Reviewed in the United States on August 26, 2024

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Ben

Cuba, US

★★★★★ 3

Just ok

Qualities OK, but for Marine applications might want better

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Reviewed in the United States on August 3, 2025

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Barbara S.

San Leandro, US

★★★★★ 5

Great quality

Just as described.

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Reviewed in the United States on July 22, 2025

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Paul Kirchberger

Pawtucket, US

★★★★★ 5

Bellows kit review initial inspection’s

Very good quality. The hose clamps were event the better ones you have to pay extra in most cases.

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Reviewed in the United States on April 6, 2025

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Captain Ron

New York, US

★★★★★ 5

Good value, very useful for go kart wiring

Size: 100ft, Style: 6C-18AWG

It's a good spool to have around to wire lights and things on the go karts. Also came in handy when I had to patch a bit of melted wire harness on the tail of the old Dodge.

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Reviewed in the United States on May 6, 2026