No, this is a high frequency filter, which filters HF - Transients with minimal power but a wide frequency-spectrum and shortens them to ground.
The closer the better.
To understand my schematic here is a very, very simple explanation:
Imagine C1 ist a little energy storage. With no load C1 is loaded near to battery voltage (and is therefore full of energy). The schottky lets the current only flow from + to direction load, load to + is impossible. -> the schottky is a one-way-valve. Therefore other loads onboard cannot consume capacitors stored energy.
Now you switch your load to on, the first current spike appears, system voltage breaks down. This is capacitors moment: He gives the stored energy to load. Current spike disappears, system voltage raises to its old value and capacitor will be reloaded out of the battery and so on.
Read this: http://en.wikipedia.org/wiki/Decoupling_capacitor
I can't give a one-size-fits-all solution via the forum because i've to less information, it always will be a try and error. With your bike in my garage and my scope it would be peanuts.
Another idea would be to use my schematic on the ECU to provide stable voltage for it (injector timing is voltage dependent !!) .
Use it for pin 17 of the ECU and relay No. 49 . Fuse F1 -> Schottky -> Electrolytic 10.000 uF with 1nF in parallel to negative ground -> Relay pin 30 + ECU pin 17.
Gunther
v11-schematic.pdf