problem is no matter how much stuff or balancing shaft u add to ease the vibration
3 pot is still 3 pot, it's not balance
the balancing shaft only prevents the vibration from reaching the cabin/driver only
sooner or later, weird noises are going to come out

look at out viva, kenari, kelisa...the belting noise is infamous

noise that a normal 4 cylinder engine will never have

3 cylinders are more efficient than 4 cylinders. but they rev slower than 4. Some experts says best engines come from 3,6,12 cylinders. while 4,5,8,10,12 makes the best sound and better NVH.

they got punished hard which i still hope it happen.

Recently they overtook Honda sales, but i believe is due to new honda city launch. Thats why sales has been bad for honda.

Vios engine and the gearbox is such a let down.