Honda CB400 | CB450DX | CM400 | CM450 Ignition CDi Unit


Product Downloads


Rex’s replacement CDi unit for CB400, CB450DX & CM400, CM450 twins that have units marked “TIA01-20”.  Applicable to Honda part numbers 30400-413-305, 30400-MC9-831, 30400-443-015, 30400-443-015 & 30400-443-005.

Our technical team have many years electronics design experience and produce high quality ignitions that are trusted worldwide.

We are able to fully test and run these units. Refined through years of experience to remove flat spots and surges and improve engine response.

  • Back up by UK electronics manufacturer with in-depth knowledge.
  • Simple to fit with correct connectors – no set up
  • Great starting and crisp throttle response
  • Complete with super secure metal mounting bracket
  • 100% tested and run before dispatch

We have a free to download troubleshooting guide for these bikes above and on the tech support page of this website.  If problems remain or change after replacing the CDi unit the system has other faults which are likely to be in the generator. Our technical team are able to offer OEM quality repairs to generators.

Additional Information

Weight0.31 kg

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