pop and dead.

[Meshuggah]

Now I went for long ride today. to check things out. Everything seemed fine but sometimes, when I released the throttle, the bike felt like was decelerating too fast, like the engine was suffering.
Then i stopped at the petrol station to fill it.
Got on it. left the petrol station. Accelerated hard (big road ahead), shift gear accelerate again and then I heard a bang, engine dies, back wheel locks.
I was on the side of the road then. all electrics seemed fine. no smoke no anything. I see the fuel cut off switch is in the off position.
So I thought I must have moved it by mistake, even if it seems strange, I've never done it before.
Try to start the bike again, in neutral, ta ta tatatata nothing.
same thing for about 2 to 3 times.
Then I hold the clutch in, first gear and the bike starts.
Any ideas? was it the fuel kill switch or could have been something else. I'm worried I'll be left stranded in the middle of nowhere in the future...
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Triumph Tiger 800 2012

[Vincent]

How fast were you going when the back wheel locked up?
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Space Is Deep

[P.addy]

Killswitch being off won't lock the back wheel if its currently moving, hence killswitch backfiring

Whatever it is, I'd be keeping a tight watch on seeing what happens just before it does that. When did you last check the oil?

[_Iain_]

Isn't this the bike diagnosed with fucked gearbox bearings or am I confusing it with another?

Edit; Wrong bike. However https://www.bikechatforums.com/viewtopic.php?p=3570998&highlight=#3570998
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[Meshuggah]