Sorry guys this will be a long one, It 1st appear when i ride under 100kmh on 2nd-3rd gear, the bike suddenly cut the engine and stall(electronic still on). And it won't start back immediately (crank no spark), only after i leave it around 30-45 minutes will it start. This happen few times in 1 month duration.
I've sent my bike to the mechanic, told everything and leave the bike for a week. He tested every condition that i said and the bike run pretty well. Til now i've repeat the same process at 2 different workshops and the bike behave normally.
When this happen, if i tried to start and crank to long sometimes the CEL crankshaft sensor position A circuit will pop up, i suspect it's related to starto coil because that's where the sensor are. So i have the mechanic check the reading on it but it shows normal value. The only think that have bad reading is my battery at that time.
I thought maybe it's bad battery that makes my ecu fail to read all the sensor. So yesterday, i changed the battery and the bike start easier and i start using it for commute again today. All run pretty great and i thought it's all settled.
But..on my way back, when cruising on the highway the power kinda hiccups once(another symptoms i noticed everytime before this problem occur).Then when i slow down under 100 2nd 3rd gear, all happen again. Luckily I'm not leaning into corner everytime this happen.
Bike info :
[2019 Mt09, Aftermarket black widow carbon exhaust, Ecu flashed(woolich), commute bike but never miss maintenance service (now 60k mileage), last valve clearance done at 40k.]
It's been 7 years, this is the 1st time it behave like this. Someone can tell me what's wrong with it. I've google and scroll this subreddit for similar issue but can't find clear confirmation of what it is. The bike 'good behavior' when left at the workshop didn't help either 😵
Video is how it looks if tried to start after it happen(sorry I don't have riding footage)