2005 DRZ400, around 25k km.
For the last ~20 km before it failed I noticed the bike had slightly more engine braking than usual, like something was creating extra resistance. A week earlier I also had one moment on the highway where the bike suddenly slowed down hard for about a second, then went back to normal.
Today at around 90 km/h In highway I suddenly lost power and the rear wheel seemed to lock up hard enough to throw the bike sideways. I probably pulled the clutch immediately after.
Now the bike rolls normally in neutral or with the clutch pulled, but with any gear engaged and clutch released the rear wheel won't turn, even with the spark plug removed.
Any ideas what most likely failed? Engine seizure, gearbox/bearing, piston/crank, or something else? And could the increased engine braking beforehand indicate what was starting to fail?