Need opinions on seize piston/cylinder, M1000 BD.

That what new new pistion burn down looks like

Just got to warm to fast and yes it was probable a little tight. When I put a turbo on a new sled I try and get 3-4 rides before I push it then I am safe.You can try the 09 M8 break in witch as to over heat it 3 times with out going over 6k rpms. Just hone that cylinder out and do it again. Good luck.

3. Elevate the rear of the snowmobile on a secure,
shielded jack stand.
4. Slowly vary the engine RPM and throttle position
gradually from idle position to a maximum of
6000 RPM until the Coolant Temperature Warning
Icon stays constantly lit while making sure not to
exceed 6000 RPM. Continue varying the throttle
and RPM for an additional 1-2 minutes.
NOTE: Make sure to lubricate the slide rails with
water or other appropriate coolant/lubricant to prevent
melting of the wear strip.
5. Allow the engine to cool to ambient temperature
(at least 30 minutes).
NOTE: Repeat steps 2-5 at this point.
6. As part of the standard operating procedure, operate
the snowmobile during the first 1 to 2 miles
under 6500 RPM to properly warm the engine
prior to extended wide-open throttle use.