Just watched this video of the bikes performance against the yamaha in India...seems like a great bikeIs this what your bike looks like ? It already has a upright riding position . Looks like a fun little bike to ride . I'd see if you can find an aftermarket exhaust and remove the rear fender .
Your bike only weighs 297 lbs ,that not much at all . My 750 weighs in around 400 + . Probably closer to 450.