• 10 mm Shaft Clamp – for holding the air shaft during rebuild
• 38 mm Dust Wiper Seal Tool
• 10 mm Bullet Tool – for installing the negative sealhead on the sharp-edged shaft
  • We haven’t tested a full rebuild on the Onyx 38 ourselves yet.
  • DVO sells inexpensive bullet tools but does not confirm sizing.
  • Likely uses the 10.0 × 8.0 mm bullet size (not confirmed).
  • Our Fox NA2 10 mm bullet (+$8) may also work.
  • Recommendation: If possible, get the DVO bullet; ours is a safe fallback.

• Cassette Tool – for removing the splined top cap
• Metal Picks – for the air piston circlip
• Blue Loctite – for air shaft threads
• Air Pump – to re-pressurize after the rebuild

Official Manual:
DVO Onyx 38 Full Service Guide (PDF)

• No OTT spring: The Onyx 38 uses a standard air spring (some versions may still have OTT, confirm your model).
• Splined Top Cap: Requires a cassette tool like this one.
• Air piston uses a circlip, no threaded sealhead or cartridge body to clamp.
• Add 5–7 cc of oil to the positive chamber during reassembly.

• Dust Wiper Tool Finder
• How to Clamp 10 mm Shafts Properly

• Do not overfill the air chamber, excess oil behaves like a volume spacer.
• Use blue Loctite only on air shaft threads.

This kit does not include cassette tools, circlip pliers, or other standard workshop tools. Instructions are based on DVO’s official Onyx 38 guide and workshop experience. Always verify compatibility before disassembly. See our Terms of Service.