mine is completely stock as well.
Not gonna waste money to mod it.
A city can't go any much faster no matter how much money we put.
Spending money on a 1.5 liter engine is just not worth it.
& of course the CVT is a major limitation.
The city is a beater car. I don't baby it.
Gotta save to buy my intermediate dream car..350z
then can break the bank to twin turbo it

btw, anyone here use the 7-speed to downshift for engine braking?
I do it all the time that it becomes second nature already.
Whenever I need to brake, I'll activate the 7-speed & lower the gear gradually down to 2 while pressing the brake paddle gently.

Especially when I'm speeding & a turn coming up or some losers suddenly blocking my way.
Our brakes felt too weak & easy to fade.
Engine braking helps a lot.
Sometimes I don't even need to press the brake paddle.

Will this adversely affect the CVT in any significant way.
Yes that definitely put extra stress on it.
So far so good.