I have been reading things on this forum for quite some time when trying to trouble shoot but I am new to posting.
Anyway here is my issue, I have recently bought a secondhand 2012 WR450F and I am having some electrical troubles with it. it is standard except for the yoshi slip on muffler. I have contacted the dealer and they have claimed that there is no warranty so I would prefer to fix the problem myself.
It is an intermittent problem so its difficult to find the source but maybe someone can help. When it starts it will run fine, it does not cut out unexpectedly, it makes good power and all of the electronics work as normal. Sometimes though, when i turn the ignition on the fuel pump does not prime and the starter button will not work, that is, I push it and nothing happens, It does not even try to start. It will not start on the kick starter when this is happening either.... When things are working the bike is great to start, when it isn't it won't start at all, no matter what I try. Then, without doing anything that seems as though it would fix the problem, I will turn the ignition on again and the fuel pump will prime and the bike will start and run perfectly. It may start fine the next 5 or 10 times and then it will do it all over again. Currently the bike is dead and staying dead, luckily this happened at home right next to the work shop so at least I didn't have to push it too far.
The relay that the safety switches (neutral switch, clutch switch, kill switch and kick stand switch) are tied to is not operating when I turn the ignition on. I have checked the switches with a multimeter and cannot fault them for operation. Which makes me wonder what else is connected to the relay (#19 in the wiring diagram I think) and where else I need to focus some attention. I find it hard to trace out because everything goes into joint connectors and I lose it from there. I should mention that my experience at reading wiring diagrams is limited with these sort of bikes as I am used to much simpler motocross bikes.
I am suspect of the lean angle sensor because I know very little about how much control it has over the starting and running of the bike. Could this be the cause of my problem?
If anyone could help to shed some light on this issue I would be thrilled to bits.