how do you wire up a rev gauge to a bike that doesnt have one as standrad

ingnition live to the gauge an earth the gauge to the coil earth terminal same as when fitting them to cars ?

mine uses a cable, so no, not in my case

I've wondered this too, my sr125 has no rev counter but I want one too...

It depends on the make of the tacho. You may need an adapter to make it read right. Often the number of coils makes a difference because if it only counts one signal from one coil, and you have 2 coils, it will only read half the revs.

get an aftermarket one, they have the instructions. I'm assuming one pulse is 1 rev, whether its a multi or single on the same crank?

drewpy

what after market item do you recomend

depends if you want to got modern

http://www.trailtechproducts.co.uk/