Vertex Top End Rebuild Kit - YFM350FW Big Bear 1997-99 (V-23103) 82.95mm

Vertex Top End Rebuild Kit - YFM350FW Big Bear 1997-99 (V-23103) 82.95mm

Marsoni

M251S

$135.80

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

Vertex Top End Rebuild Kit - YFM350FW Big Bear 1997-99 (V-23103) 82.95mmVERTEX 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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Considering that this brand tends to be a bit hit-or-miss (mostly hit) I was apprehensive about the fit and sizing. These fit so well that I bought other colours and have no issue with the sleeve length (often cheaper brands have very short sleeves) nor with the length of the body of the shirt. They look great, the fabric quality is excellent, and the colours are compatible with a broad range of pants (you can't go past black pants, black jacket/blazer, and any colour of this underneath).

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Reviewed in the United States on May 20, 2025

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John Carosella

Lowell, US

★★★★★ 5

Nice feel

Special Size: Two Pack, Size: Medium, Color: A-wine Red/Dark Grey

I’m 5’8”, trim and athletic build. The sleeves are a tiny bit tight and would be unpleasant on a warmer than expected day, but for a cool day just fine. Nice fit. Feels pleasant to the touch.

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Reviewed in the United States on March 5, 2026

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amazon_tom

Cuba, US

★★★★★ 4

Good fit, light weight, very comfortable

Special Size: Two Pack, Size: X-Large, Color: Black/Army Green

I've purchased several of these now and overall they seem like a decent buy for the price. They are very light weight and seem to retain their shape and avoid wrinkling when hung to dry after washing. Despite never seeing a clothes dryer however, the black variant still pilled up a bit after moderate use. There seems to be some variation in sizing: all the black and olive colored ones seem pretty consistent but the gray run small and the blue just a bit large (all purchased in XL, me at 6'3 and 225#)

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Reviewed in the United States on December 19, 2024

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Erica

Lexington, US

★★★★★ 5

Great with a great price

Special Size: Two Pack, Size: X-Large, Color: A-blue/Army Green

First off. I am female 5’10”. I thought the extra large fit great. The material is very soft and light. I think they’re warm though. I just washed them for the first time yesterday with dryer. Air dry. I’d like to see after a couple washes and know how the dryer affects it.

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Reviewed in the United States on December 10, 2025