Lancer , How you gonna get to 300 lbs ? Leave a wheel off or chuck the seat,mirrors,fenders ?
Maybe fill the tires with helium ?
It's like a diet you lose some weight but the closer you come to the target weight the harder it gets !
I know I could have shaved at least another 10 lbs by making the RYCA battery box with aluminum and chucking that seat bracket and not filling the bars with silicone. I'm happy with it at 308-310 lbs wet , it's rock solid and should hold up for many miles ! Your rear wheel looks heavy , is it heavier than stock wheel ?