need just a tad more power

[Buckaroo Banzai]

Just got a Wolf rx50 scooter. While it runs good enough on straights it needs more power going up the hills. Some hills I go 15 or slower.
So, I was thinking about doing a 80cc cylinder upgrade. I'm hoping that will be enough.

Also, is getting another carb worth it or rejet the old one. If I just changed jets in the old one would there be any reason to get a new carb.

Also, I've heard these bikes run lean from the factory so even if I don't do any modes to the bike I still should have it rejetted . Should be a real cheap improvement ....