A week after getting my Mana back from the workshop with an unidentified issue, the bike was running better than ever. New transmission belt and chain and sprockets at 48k kms. Lane splitting my way home in peak hour traffic, after 5 kms in virtually stopped traffic, the engine cuts out leaving me rolling down the middle of the two lanes. Made my way over to the shoulder of the road to stop. Tried a number of times to restart but when I turned the key on, the red alert light came on, the word SERVICE on the screen and no engine check or fuel pump noise or start up indication when I pressed the ignition start.
Not having any idea what to look for, called a tilt tray to drop me and the bike home. Another trip on the ute down to the workshop, more diagnostics by my mechanic only to find that there was a small stone from a resurfaced road that had found its way inside the protective cover of the thermo fan. The bitumen had caused the stone to stick to one of the fan blades at some point and the fan motor had overloaded in freeing up the blades. The stone was now loose but the fan motor was drawing more current and subsequently blew the main 20 A fuse on the bike.
I did recall a few days earlier driving over some new road works and hearing a lot of stones being thrown up from the front wheel as happens. To confirm the mechanics findings, he put the fan on a stand alone battery and within a couple of minutes the wires were so hot you couldn't touch them. Also, new fuse in without the fan, the bike ran fine. Reconnected the fan, started the bike and let it idle until the fan kicked in and the fuse blew again, stopping the engine. Seems that there is a lot of important things powered via the main fuse including fuel pump so the bike just stops.
Anyway, a new fan from Aprilia and all is good again. All up, tilt tray $90, fan $234 and diagnostics and installation $140 makes for an expensive little stone.
Now, the bike is running great, 50k kms service booked in for a weeks time with new front disk pads to be fitted.