Simple ECT mod (questions)

[Ivo (VRCC 34034)]

I have read a lot so far about doing the mod. What i hve learned so far is that most keep, when using a pot, the resistance most of the time in the middle.
And since I live in Holland, and all fuel here is 95 or 98 ron, there is no need for me to turn the resistance down. In Germany they still sell some 91 ron.

When doing an ect-mod with pot the maximum resistance is 2,8 kOhm. With the pot half way up the resistance drops to 800 Ohm.

When doing a simple ect-mod it seems to me that I can better use a resistor of 1 or 1,5 kOhm. Is this correct and how much advance timing would I get?

Further, on which wire does the second diode (clutch) go? Can someone clear that out for me when looking at the pic in shoptalk from SubMan.

And last, just wondering, why solder a resistor on the potmeter (when using one) and not just buy a logarithmic potmeter with 2,5 kOhm.

Thanks in advance.

[BlueValk]

Hi Ivo,

Yes, you can use 1.k resistor (820 would be closer to half voltage).  The amount of advance is speculative, but would I guess around 5-6 degrees.  This resistor is in parallel with a 2.5k that is in the ICM, and is using a 2.5ma current source.  I don't know that the ICM is linear with respect to the voltage, but assumed that it was.

The anode of the second diode connects to the same wire as the first diode (from the neutral switch).  The cathode end connects to a wire from the clutch and I believe, it is in the headlight assembly.  It is a 9-pin connector.   The wire is Blue coming from the clutch and is G/R on the other side of the 9-pin connector.

A 2.5k logarithmic pot would work, but was not easily available. 

Good luck,
BlueValk

[Momz]

I've done the simple ECT mod and used 1 amp resistor and diode. I believe that if your going to modify your bike keep it as simple as possible. You can always add a potentiometer at a later date if it warrants more modification.

The higher amp rating of the resistor and diode will give you thicker wires, which will make the modification a bit easier to twist to the wires and better to get a better solder joint.    

[Ivo (VRCC 34034)]

Thanks for your answers.