Hard to reach 100kph /62mph

[ralphbalena]

made the following progress already:

1. valves checked and adjusted
2. adjusted chains
3. tires upgraded front (120/90/18) rear 130/70/17
4. change carb to 34mm with 145 main jet
5. cleaned air filter
6. spark plug changed to iridium


however i feel that the bike still is not that responsive? on the highway the bike still struggles to reach 105kph here's a video of my shifting pattern.

[Oldenslow]

Low tire pressure? It's happened before...