Description
Our CDi units are hand built by technicians who are passionate about ensuring your motorcycle performs as well, if not better than when it was new.
Rex’s CDi unit for the air-cooled Yamaha RD250 & RD400 1978 – 79 (E &F) using original p/n 2R8-85540-51. The box is often marked 070000-038.
Bolt on and plug in, no set up, factory timing.
This version has bullet connectors. Check carefully which connectors are on your machine.
One year warranty from date of purchase.
Made in England
A new CDi unit is only one part of the ignition system, so if a brand new ‘plug-in’ CDi unit does not fix, or changes the symptoms then your next action is to consider other parts in the system that may need to be replaced or repaired to clear the problem, especially where that system is over 20 years old. You can be sure that the issue will be found in an old part you have not yet replaced.
Our technicians have worked with, studied and manufactured ignition systems for over a decade and now we have published a guide detailing how to troubleshoot and overhaul ageing CDi ignitions that no longer work as they should. This publication is available free of charge on our technical support page.
