Latest Engine Reviews – You could win up to $500 for reviewing products!

  • K & N Oil Filter

    K & N Oil Filter

    Andrey in MN

    Great Value For The Price

    Good quality filter.

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  • Tusk Engine Oil Seal Kit

    Tusk Engine Oil Seal Kit

    Andrey in MN

    Thumbs Up

    Great quality aftermarket seals for the do-it-yourselfer.

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  • Pro X Complete Gasket Set

    Pro X Complete Gasket Set

    Wyatt in IN

    Great kit

    Excellent gasket kit. Very Complete. Top quality.

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  • Tusk Oil Filter

    Tusk Oil Filter

    Matt in IN

    awesome item

    Perfect fit

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  • Cylinder Works Standard Bore High Compression Replacement Vertex Piston Kit

    Cylinder Works Standard Bore High Compression Replacement Vertex Piston Kit

    Davin in Minnesota

    Try it!

    I put one of these in my buddy's 2006 CRF250R and wow what a change! His bike's engine was transformed. Although it was knocking on 91 octane. I believe it worked on 93 octane, but we switched to 110 shortly after install. After the success in his bike I decided to get one for my 2012 CRF250R when it was time for a new piston. I was skeptical as stock compression was 13:1 and this Vertex piston is 14:1. Im here to say these pistons really do make a huge difference. After the install I was very impressed with the power delivery. Feels a lot stronger all through the RPMs. Im not sure if 91 octane will work, I run 110. I have a loudmouth intake, stage 1 cam, CRFs only tune, and a Yoshimura exhaust to compliment this piston, It all works extremely well together. Piston even made my bike sound meaner. My brother is a KTM fan, he likes my engine better. His ideal bike would be the CRF engine with this Vertex piston in his KTM frame. I will continue to buy these pistons. It came with Cometic gaskets, which are also top of the line.

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