'12 450 battery delete and wiring questions
Posted June 26, 2014 - 02:32 PM
Second, as I am removing the lights, e-start, speedo, etc, I will have a whole lot of wires not leading to anything. Is there any way to remove them from the harness so I don't have the extra weight and bundles of wire under the tank?
Any advice is appreciated. Previous threads tend not to go into much detail. Please no lectures about the impossibility of turning a WR into a YZ, I get it.
Posted June 26, 2014 - 08:19 PM
Basically you just disconnect the battery. Try it. You'll see what I mean. Disconnect the positive lead and isolate it. Then kick start and ride it. Wala, it works.
Edited by MidlifeCrisisGuy, June 26, 2014 - 08:21 PM.
Posted June 26, 2014 - 08:30 PM
It turns out that everything in the relay tray can be deleted. None of it is essential. Chech the wiring schematic for more info.
When you remove the battery the ground cable to the engine will be non functional. It turns out the wr450f runs an isolated stator and thus the entire power system grounds to the engine through that cable. This occurs via the ground feed comming from the stator. To fix this issue, fabricate a jumper that goes from the black stator ground to the frame. Problem fixed.
Posted June 26, 2014 - 08:41 PM
Several Australian soures have mentioned a special lightweight harness, but Ive never been able to find it.
Im also not sure what the aus harness would do... as some of the people running the light harness retained electric start ! This leads me to suspect that the aus bikes come nearly road worthy witb signal lights, etc and the special harness deals with removing that stuff.
I also looked into using a YZ harness. That wont work because the ECM connection is different, for starters.
Im reluctant to mod my harness because right now I could return my bike to stock fairly easily.
I dont doubt there is a pound or so to be saved by slimming down that harness.
It would be easy to make a custom harness if on had access to the connectors.
Posted June 26, 2014 - 08:44 PM
I refrained from posting this stuff because I wasnt sure there was interest.
Posted June 28, 2014 - 07:52 PM
I'm looking to remove the entire E-start sysytem and lights
Keeping the low fuel light and ignition switch, are they separate?
So the assembly with fuses that the battery cables come from is not needed?
I'm terrible at understanding wiring diagrams
The low fuel light and the ignition switch are still fully functional after you remove all the stuff under the seat.
FWIW, the fuel light can easily be implemented with an LED, if you are looking to keep it. I don't see much use for keeping the on/off button, but your mileage may vary.