I agree the seat is leaned forward. Here's a pic showing the factory rack is tilted too;
I thought of lowering the back to fix this using something like this, it drops the back of the seat by 1 inch;
In Thailand it is usual to shave the seat foam (you can get it modified for $8!);
The bike was a 50cc then went to 150 then 175. I think is was designed for the smaller engines.
They use lighter rollers in other countries as the top speed is much less. They might not notice the tilt
as much. I feel it more when I try to run higher speeds.
That bumpy seat may be a factory option in some markets. Here is a factory upgrade for the Movie S;