Easy answer is to just buy 1300 or 1400cc K11.
Search due diligently until you can find one in good well maintained OEM condition that has not been messed about with by previous owners.
NB; coil packs have a little extra power, less than 5HP to compensate for being significantly heavier.
Avoid the underpowered 1000cc granny wagons. Simples!
Good luck & enjoy driving your K11 motoring.