On my bobber built I saved quite a bit of weight, but that wasn't my main objective.
- omit front fender/brace
- lighter rear fender (thinner/shorter)
- removed airbox, battery box, toolbox and brackets
- single seat
- removed subframe for fender
- smal alloy petrol tank
- lithium battery with custom made bracket, mounted to gearbox
- used some stainless pipes and a db-killer instead of a muffler
But whatever you do, it will remain a heavy bike, especially for its power... For me this is a cruiser bike to enjoy riding. If I want to get somewhere I will take another bike or even a electric bicycle