Aprilia RS 125/ KTM 640 LC4 Supermono

Well I took it to Rockingham, Went lunchtime so I could have a tinker. Seemed to be running ok but had a slight coolant leak. Took tank off and fixed that.  Decided to give it a run through the tunnel and back. seemed ok but really low on power, got me through the tunnel and up the hill to the turn area then stalled about 3 times, coasted back to tunnel and eventually got it started and limped through the tunnel and back to car. Stalled just at the car and then the starter started cranking of its own accord. Got to the new master switch and turned it off. Loaded up and went home. Bit miffed. Calmed down a bit now, 1 there must be a fault somewhere in the wiring that is giving false signals to starter system. 2 The relay must be under specified to keep fusing closed like it has. Engine - either I got the cam fitted one tooth out or it has an air leak/ fuel restriction. May have to wait a while as I have other things to do that I have been putting off for a while. Keep checking

Update. Did the rebuild of the cooling system and the thermo housing can be moved 180 deg so the large outlet faces down, which gives a better hose run to the rad and gets rid of the airlock u bend. Fitted new starter relay ran the engine to check cooling and shut it down before I gassed myself in the workshop. Few seconds later it started cranking again while my back was turned. Got the battery cable off but it was too late the ni-cad battery hade a hissing sound and a nasty smell, so I think that is dead now. I have thought long and hard and am convinced I have the wiring correct. I am going to try to free off the relay and  put battery on with a crocodile clip (quick release ) and jiggle the wiring round and see if I can find the fault.