Hi all,

been going through different threads for a few days looking at other answers regarding no spark on my cbr and followed a lot of the steps such as checking all the basics, fuses, side stand switch, clutch switch, pulse generator resistance (think that’s the name the 2 wires by the clutch case) all that seems to check out, have 12v to one wire of each coil and between 3-4v on the second wire (not sure if both should be 12v?)

also read about the pink wire coming from the ignition switch being an issue with the diode however I only have 3 wires coming from the ignition and none are pink, all 3 have 12v on them,

im starting to pull my hair out and won’t lie electrical dignoisis isn’t my strongest skill but if someone could help me out I’d be extremely greatful, or if anyone is based in Cornwall and thinks they could help even better, or if someone could talk me through where else to check or how to test the ignition control module via FaceTime or Skype would happily PayPal someone for their time as reluctant to take it into a garage as it’s in soo many prices at the moment and would have to pay a transport company to move it,

thanks Kieron

 

Welcome to the forum Kieron, have you done anything to the bike since it last ran?
Looks for posts from Dannoxyz, I think he has already posted the initial basic diagnostic test for an F4, if not he will pick up on this.
Cheers
Al

 

I bought it as a none runner all I was told was it fell over in the wind and hasn’t started since was assured it just needed a carb clean

 

That may well be problematic as who knows what the PO has done with it
Still to start with the following is an extract from the service manual.

 

diode failure on these bikes are common, and when it happens most people replace the ignition switch with an aftermarket one. some of these use a different color wire for the 9v source. pull your tail fairing off and look for the pink wire on your CDI box connector. check for 9v there to ground. if its 12, the diode has failed and needs to be replaced again.

 

Not sure if the F4 has the ignition diode? I thought it was only introduced on the injected bikes.

 

the F4 has an ignition diode. its a frequent topic discussed in this forum. if you search it in this section, you will get a number of search results that pop up.

 

Yep, gotcha 👌
Was thinking F3 v F4.
Found this
[size=16px]"anyone who ever has a no spark issue on a Honda motorcycle, please read !!!!!!![/size]
[size=16px]There is a diode in the switch base of the ignition switch. IF that diode pops for any reason you will have a no spark/no fuel pump issue. The value of the diode is 3.9v 0.5watt part number NTE5007A"[/size]

 

Post photo of bottom of ignition switch

 

I don’t have a pink wire coming to the multi plug just red, red/black, blue/orange, can’t remove the ignition at the minute as one of the Allen bolts has rounded need to order an extractor