gingerprince
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| posted on 18/5/11 at 09:15 AM |
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Fireblade CDI wiring
Anyone a genius with Fireblade CDI wiring? Trying to figure some stuff out - I seem to have inadvertently started on a loom tidying process whilst
relocating my flatshift kit.
I'm trying to figure out exactly what is required in terms of CDI connections for the engine to run.
So using the following diagram: -
http://www.comdiddycom.com/Wiring/R_S_CBR.jpg
I have deduced that: -
The starter relay is live when start button pressed and
Bike is in neutral (pulled to gnd via diode Green/red to Light Green) or
Clutch depressed and sidestand is up (green/red to clutch switch to green/white to side stand switch to ground)
That makes perfect sense.
I also deduce that the purpose of the diode is to prevent the neutral light energising if you depress the clutch. If neutral is wired separately in
the car therefore (to dash light), this is superfluous.
I can therefore simply ground the Green/red wire to allow starting.
The query comes from the CDI connections. The purpose of each of the 9 connections I believe to be as follows: -
Yellow/green=tacho signal
Green=GND
Black/white=Ignition feed
Blue/yellow and Yellow/blue=coil feed
Yellow and White/yellow=pulse generator
The last 2 are more confusing: -
Green/white is pulled to ground if: -
a) Sidestand is up or
b) Clutch is depressed and bike is in neutral (? seems odd)
Light green is pulled to ground if bike is in neutral (so this appears to tell the CDI it's in neutral)
Light green is also linked with the Green/white in the case of b) above
By eliminating solder-in-place-of-switches in the existing loom, I've found that the car will start and run if: -
Green/red from solenoid is grounded (simple enough) and
Green/white from CDI is grounded (to run)
It seems to matter not a jot whether or not the light green wire is grounded. It will start either way.
So, after all that (you should always show your workings  ), what is the purpose of the light green signal? Why does the CDI need to know if the
bike's in neutral? This wire on its own won't allow running without the green/white. I assume there must be some logic in the CDI, I
just can't figure out what?
Thanks
Simon
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matt_gsxr
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| posted on 18/5/11 at 01:20 PM |
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the clutch and sidestand interlock is pretty standard. Bikers sometimes start the engine before climbing on, to allow a little warming whilst
shutting the garage door (for example). If it were started in gear then this would be bad.
On the stock gsxr1100
You need either:
In Neutral with Sidestand down (i.e. For warming up)
or
Sidestand up (i.e. For running)
If you have soldered the wire that tells the ignition that you are in neutral, then it doesn't care about the sidestand. Not sure of the exact
logic of your bike, but it sounds like the same sort of situation.
In reality in a car you can junk all the logic and wire it to ignore these switches (like you have already).
Matt
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