F4i - Main Forum Main F4i discussion board

Someone Please

Old 10-17-2011, 01:32 PM
Junior Member
Thread Starter
Join Date: Oct 2011
Posts: 13
Default Someone Please

can u tell me is the cdi box for fire only or does it have something to do with power to the whole bike
Old 10-17-2011, 01:47 PM
Senior Member
Join Date: Mar 2009
Location: Baltimore Maryland
Posts: 901

Yes it has something to do with both the "whole bike" and "fire". Thats why it's called the Engine Control Unit... But is that why your bike is not starting?....dont think so.

Is your bike an 88 cbr or f4i?
And why did you start a new thread?
Old 10-17-2011, 01:52 PM
Junior Member
Thread Starter
Join Date: Oct 2011
Posts: 13

bike is cbr , and i am new to cbr forum , slowly getting it figured out
Old 10-17-2011, 06:42 PM
MadHattr059's Avatar
Retired Super Moderator - At large E=MC2
Join Date: Feb 2011
Location: Tulsa,OK
Posts: 2,299

The CDI controls all of the spark timing, I believe, it also controls the fuel injection on the 'i's. It also tells the speedometer how fast you are going as well as the tach-feed.

It doesn't control the lights/turn signals/starter-circuit/radiator fan or the voltage regulation/rectification. That is all done by independent sub-systems.

Hope that helps, Ern

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.