Can anyone tell me how get a little bit more power so it can go a steady 70mph all the time. Is there any tweaks I can do.

Yamaha YBR 125cc 2013

Stick it in a van!

For a better chance of getting an answer ( not promising a sensible answer....) you could always try going to the Newbies Section and putting in a wee introduction.

As you were advised in your other post..........

I thought my answer was the most sensible answer!

Don't know about sensible - but it's the only one that will work. That is unless a homebrew Nitrous kit could be concocted.