Looks like you have plenty if help with disassembly, so instead I will posit a guess at what's wrong. Eating oil and lots of smoke. Piston LAN fracture, with likely subsequent bore scoring.
Hope not but its what I've most commonly seen
Owned to date. Honda Aero 50, Honda Elite 80, Honda Elite 250x2, Suzuki Katana, Suzuki RF600, Yamaha YZF1000R, Kymco Xciting 500, Suzuki GS500, Suzuki Burgman 650, BMW F800GSx2, BMW S1000RR, Aprilia Scarabeo 200, Aprilia Caponord, Aprilia Sportcity 250
I love and miss you Jeneca and I'm sorry.