starting no its own

hi i had a problem today when i turned on the ignition the starter run on its own. the button is not the problem cuz when i turned off the ignition it continued to turn over   i am thinking short some where found a couple of wires begining to melt coming from the battery ,white with a red stripe  so could be more, are there any known issues,   thanks 

Aprilia,electrics,known issues?     Surely not  

Melted wiring is not good,I seem to recall that colour wire might be feeding the solenoid,if it is that could be your problem.

I had this on my Gen 1 after returning from a ride. Switched off ignition and bike started turning over on the starter motor. It was the solinoid that was goosed (stuck on). Ordered the uprated one and problem solved.

Think it's behind right side fairing

Immobilisor ecu is on left side bolted to the inner fairing panel up near the rad.

hi found what i think is the imobiliser ecu but from the out side it looks fine .its all sealed up at the bottom so i take it to look in you have a job n half to split it.  i have put on the new starter solanoid come to turn on ignition nothing battery at 2 volts i hope its that thing about turning ignition on for 15 seconds because i didnt do that, i will be back with more info 

i have checked the wiring now it all seems ok i have put the new solinoid on, i stripped the old one it didnot look that bad inside .so do i try an ride it for a while or do i split the immobiliser open to see if it looks ok ?

can ya cut it out and replace it with a thicker wire ?

ok cheers for that about the wire i thought of putting  in thicker wire but why is the standard one all of a sudden to thin ? after the plug connector under the seat it does not feel as bad 

OK so started it up run it till warm and the new wire is stone cold I can't believe the difference, also seemed to start much quicker, could have been a coincidence, I will keep an eye on it

I think Ian is spot on, the cables are often in bad condition by now, and actually hamper the starting of the bike as much as they aid it.
Reading your post, first job would be to replace the solenoid- as you have done- it doesn't take much to weld itself together, and if it's an old one, it can actually gain magnetism from the coil and hold itself in, I have seen that.
Sounds like you've got it sorted though, well done.

OK thanks guys. I will look at the high amp side I never thought that they would not have been big enough