59 all stock set up mio sporty

Mga sir newbie here pa advice naman po sa set ko ng mio sporty ko.
59mm mtrt cb semi dom piston
Stock head (pnp)
Mtrt valve spring 5 turns
Mtrt lighten valve
Jvt 6.0
Spec v 13.5 df and pulley
Jvt 1000rpm center spring
Sun 1000rpm clutch spring
Sun bell
7x9 flyball
High gear 14/41
Mtrt evo 3 pipe
Keihin 28mm (nka fix ung pin)
Jetting 118/40

Noong hindi pa po ako nka pnp at nka big carb mejo matipid naman po sa gas pero noong nka pnp at big carb na ako 2 liters nauubus ko 28kms lng na biyahe ko.
Advice ng mekaniko palit daw ako swr 28mm na flat side.
Ano po masasabi niyo.
Balik stock carb or bili 28mm na flat side.
Pang daily use at long ride po purpose ko
And top speed.
TIA po sa sasagot.