Let me tell you my story. I have a 2008 A/C Super 9. Went about 36 MILES per hour stock, unrestricted drive boss. Nothing would get it faster, so I upped the game with a new variator, rollers, CDI and spring. It accelerated faster but top speed remains about 36MPH, verified by GPS.
So, next comes the big bore kit- Airsal 70 mm jug, Arreche 19 MM carb, and Technigas pipe. I matched the intake port carefully to the larger carb.
After much plug reading- it goes 47MPH. GPS verified. Nothing will get it any faster, but it pulls like a freight train and will beat most cars off the line.
Are you reading your speedo in MILES per hour or KILOMETERS ? I think most people don't know they are KPH....
Oh- and I weigh around 200 lbs- you gotta be pretty skinny to go faster, I guess....
I have never ridden a L/C Super 9, but reading some posts, they must be a helluva lot faster...
I am still shooting for 60 MPH.