Vertex Top End Rebuild Kit - KTM 350 SX-F 13-15 87.96MM (V-23831A)

Vertex Top End Rebuild Kit - KTM 350 SX-F 13-15 87.96MM (V-23831A)

Marsoni

M251S

$249.30

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

Vertex Top End Rebuild Kit - KTM 350 SX-F 13-15 87.96MM (V-23831A)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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So, this really is a nice watch and if you can get it on sale it's a bargain. The bracelet is junk, with hollow end links. I would recommend replacing that with some type of fabric or rubber type strap. The reason I took one star off is because the chrono function isn't the best style. If you don't plan to use it much or only plan to use it for 10 minutes or less that's fine. More than that and the minutes counter flies back to zero and starts counting again which can be confusing and the next register is the combo 24hr and chrono minutes/hours counter which isn't easy to use for timing say 30 minutes or so. The standard type chrono counters are way better by design and Timex sells another one with standard counters with neat multicolored registers for less money. Otherwise it's a solid watch comfortable to wear not too big or thick or heavy. Of course it has mineral glass for the xtl so you need to be careful or it will scratch pretty easily but for the price.....

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Reviewed in the United States on September 7, 2024

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Huusi Huudi

San Leandro, US

★★★★★ 5

Value-packed chrono offers so much

I love this watch. Dial and movement are fascinating. It’s quite a show when the chrono is engaged, the timekeeping central seconds hand conyinues sweeping around, and the chrono’s central seconds hand is also sweeping. So you have two central seconds hands chasing each other around the dial when the chrono is engaged. On the retrograde subdial displays, time for a second time zone is displayed when chrono is not engaged. Elegant logo counterweight on one hand. Lots of content, complication and engagement for very little money. Highest recommendation for those interested in a watch that has a lot to offer.

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Reviewed in the United States on January 25, 2026

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Greg

Natrona Heights, US

★★★★★ 5

Very nice!

Color: Stainless Steel

This is a very nice watch! Feels great!!!

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Reviewed in the United States on March 2, 2026

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Placeholder

Lowell, US

★★★★★ 5

Very nice watch for the money!

Little heavier than I thought. Weighs about 7 oz. the band itself weighs 4 oz. I replaced it with a much lighter leather band. Much more comfortable.

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Reviewed in the United States on December 8, 2025

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Jack

Phoenix, US

★★★★★ 5

Fly back / duel time zone / under 200 bucks!!!!!

Color: Stainless Steel, Color: Stainless Steel

Incredible people don’t realize Timex is American history. It’s heavy and it’s a flyback chronograph with a dual time., that’s an expensive complication on any other watch. This would be thousands , it’s almost like a fidget toy lol , you have six hands that are working you can dual time on the chronograph as it flies back and have dual time zones for the money. It’s a no-brainer.

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Reviewed in the United States on June 4, 2026