This aluminum-oxide Flex-Hone is designed specifically for brake calipers and master cylinders, where control matters and aggressive cutting destroys parts. Produces a clean, uniform surface finish for proper seal function. This is NOT the much more aggressive silicon-carbide hone that is not recommended for hydraulic components.
Key Specs & Features
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Abrasive: Aluminum-Oxide
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Grit: 240 grit
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Application: Brake calipers and master cylinders
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Design: Flexible ball-hone for even surface conditioning
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Purpose: Light deglazing, corrosion removal, seal surface refresh
Why Aluminum-Oxide
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Controlled material removal
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Maintains bore geometry
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Safe for aluminum calipers and master cylinders
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Prevents seal damage caused by overly aggressive hones
Typical Bore Sizes (Always Measure Before Ordering)
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CRG Mfg Karts (Aluminos, GP, Maranello, Zanardi, DR, CKR) - 22mm
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SKM, Righetti, Parolin, KR, etc. - 22mm
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ART / Birel - 19 & 22mm
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IPK: (Italkart, Intrepid, Praga, FA): 19 & 22mm
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OTK Karts (Tony, Kosmic, Exprit, EOS, FA, Redspeed, Gillard, etc) - 13mm
Important Note
Always measure the bore before ordering. Sizes listed are guides only and vary by manufacturer and model year.
Bottom line:
If you’re rebuilding kart brake calipers or master cylinders and want clean seal surfaces without wrecking the bore, this is the right hone. Controlled. Correct. Professional.
