Renthal Front Sprocket Grooved - 13T 439 520

Renthal Front Sprocket Grooved - 13T 439 520

Marsoni

M251S

$39.00

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

Renthal Front Sprocket Grooved - 13T 439 520Renthal front sprockets are carefully crafted in their state of the art manufacturing facility in Manchester, UK using only the highest grade raw materials available. Using advanced computer engineering alongside CNC machining, Renthal consistently achieves perfect concentricity, fitment, load dispersion and uncompromising strength whilst ensuring maximum power delivery from each and every motocross front sprocket we produce. As a safety critial

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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

Lexington, 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.

New York, 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

Dallas, 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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Henry Williams

Battle Creek, US

★★★★★ 5

Durable and well fitting

Durable and well fitting. I drive a Honda Accord 2014 and when the under engine covers started falling off I used these to replace the ones that came off. They work well and the prying tool made replacing the retainers easier.

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Reviewed in the United States on January 18, 2026