Brush Research

Brush Research Manufacturing (BRM) is widely respected for its Flex-Hone tools, known throughout the industry for producing clean, consistent and high-quality surface finishes. These flexible ball hones are designed to create a smooth plateau finish that improves lubrication, enhances sealing and extends the life of engine and mechanical components. Their performance makes them a go-to choice for professionals rebuilding motorcycles, automotive engines and industrial equipment.

The Flex-Hone’s abrasive balls automatically center inside the bore, gently conforming to imperfections and delivering an even crosshatch pattern without removing excessive material. This controlled, flexible honing method is ideal for refining cylinder walls, restoring worn surfaces and improving performance in Harley-Davidson engines, V-Twin cylinders, master cylinders, rocker arm bushings and valve guides. Mechanics rely on BRM for reliable finishing on common sizes such as 3-5/8", 3-3/4", 4", 4-1/4", as well as small diameter hones for 8mm and 10mm guides.

Engineered for durability and superior abrasive results, Brush Research stands as one of the most trusted names in engine finishing and maintenance. Whether you’re restoring a cylinder, smoothing a bushing or improving oil retention in a critical component, BRM Flex-Hone tools deliver consistent, repeatable results that enhance long-term engine reliability and performance.