New here! What up!?

[Scootshark]

Hey guys, new here. Probably going to have a few questions along the way. Lets start with this one!

So I bought a used scooter off of a guy who let it sit for 6 years. It's a 150cc JMStar "Tank" with a 157QMJ. I have fixed and replaced a lot.
- new plug
- new coil
- new CDI
- new battery
- new fuel filter
- new gear oil
- new oil
- drained tank and filled with 93 (old gas was brown)
- checked belt (all good)
Got the scooter running and ran great, now it seems sluggish up hills and is basically topping at 40ish mph. Any ideas as to what could be going wrong? I even put the ild CDI in and runs the same. Any help would be great!