Description
Rex’s replacement CDI unit for CB400, CB450DX, CM400 and CM450 twins fitted with units marked TIA01-20. Applicable to Honda part numbers 30400-443-005, 30400-443-015 and 30400-MC9-831.
Brand new, up-graded design from Rex’s, direct bolts on, direct plug in connectors, functions exactly as the original unit. The original Hitachi unit was fitted to a wide range of Honda CB, CM and related models and was used for over a decade, often under different model names in different markets.
The CDi box is easily identified by its nine wires, the blue and white pair have a 2-way block connector, the two mounting holes along the upper edge of the metal case which is stamped with TIA01-20.
Replacement CDi ignition unit for the following models:
CB400N, NA, NB, NC, ND Superdream, 1978-86 UK, Europe & Australia
CB450T Hawk USA 1982
CB450SC Nighthawk USA 1982-86
CM400T Hawk USA – 1979-81
CM400E & C (Custom) 1980-81 USA
CM450C (Custom) USA 1982
CM450E USA 1982-83
CB450DX 1988 – 1993
If you are in doubt, check your existing unit is stamped TIA01-20, count the wires (you should have 9) and check the mounting holes. There is a photo of the original unit, above, for reference.
The Hitachi system was an advanced self-generating CDI system for its time, using additional generator windings to provide stable ignition advance control. Our technicians have taken care to ensure all of these features function as they should on our replacement version.
Today, many of these systems are over 40 years old and are beginning to require the electrical equivalent of a major engine overhaul. We have published a free troubleshooting guide that explains how the system works, the common faults and how to test it. Our workshops have the tooling and expertise to restore the precision timing windings, insulation layers and the heavier alternator windings.
One year warranty from date of purchase.
Made in England
