Description
Rex’s replacement CDI unit for CB250N, NZ, CB250NA, NB, NC, CM250T, MC04, CB250ND, NDB and NDC twins fitted with Nippon Denso CDi units marked 070000-0420 and 0421. Applicable to Honda part numbers 30400-442-004.
Brand new, up-graded design from Rex’s, direct bolts on, direct plug in connectors, functions exactly as the original unit.
The CDi box is easily identified by its eight 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 has the ND number 070000-0420 or 0421 (2 way interchangeable).
Fits
1978-79 CB250N, NZ
1980-82 CB250NA, NB, NC
1980-81 CM250T, MC04
1982 on CB250ND, NDB, NDC
One year warranty from date of purchase.
Made in England
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 them. Our workshops have the tooling and expertise to restore the precision timing windings, insulation layers and the heavier alternator windings.
