i do not agree, i don't believe that it is the main wire going into the ign switch.
is the gauges making the sweep?
in order for it to start you have to
in neutral green light on clutch lever pulled in
always clutch lever pulled in
or kick stand up clutch lever pulled in you can start in gear.
trouble shooting tree
questions
#1 when you turn the key on does the needles sweep yes go to # 2
or no could be battery,ignition switch,fuses,connectors under the tank,engine management relay,ect
#2 does the green light come on for neutral yes go to #3
or no could be not in neutral, bad gear sensor,wiring
#3 with the clutch lever pulled in push starter button does the engine turn over yes go to #4
or no could be bad starter button, bad kick stand or not all the way up, bad
starter relay, bad battery or bad connections at battery,
#4 the engine is turning over good does the motor start yes your are ok till problem shows up.
or no. Can you hear the fuel running for about 2 seconds as soon as you turn the key on yes go to #5
or no could be bad fuel pump, fuel pump relay,wiring
#5 assuming the fuel pump has enough pressure the problem could be terminals at coils,bad gas,injector or injector wiring.
we have seen connectors,fuse terminals, the wire on ign. switch melting,
this is just a helping hand and does not cover all problems. there may be mistakes in this as i have not spent a lot of time typing this. i may make changes latter and welcome info from hanso, warp and others to correct the info i have typed here.
hope this helps herman