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I have tried to make a race loom up and followed the one in the manual BUT now don't have a spark!! :smt013 Can anybody who uses one please tell me if the Grey wire going to the 4 pin plug on the ignitor box go to ground or positive?
Thanks

IIRC it goes to positive via a 100ohm 1watt in line resistor. If you havent put the resistor in the grey wire then no sparks

Thanks for that reply, it makes sense to me now you've told me that.

She runs!!!!

Davw wrote:IIRC it goes to positive via a 100ohm 1watt in line resistor. If you havent put the resistor in the grey wire then no sparks

Hi Dave,

Can you tell me why the need for the resistor..?
I have a zxr750, made up a race loom and no spark either...I wonder does it need a resistor aswell...?

John

Not sure if the 750 needs it but possibly. As I understand it the resistor overcomes the inbuilt anti-hot wiring device in the ignition key switch which drops the ignition voltage to the CDI from 12 to 9V

Sorry - it doesnt overcome it - it replaces it - as obvously with the key switch out of the system (as per a race loom) it is as though the bike has been "hot wired"

i am building a zx9r race loom trying to copy zxr400 loom but their are slight differences.can you shed any light on the subject