Tuned K-series issues were made much worse by "expert" tuners who didn't really have a clue.
Aftermarket cranks with worse balancing than production cast iron ones.
K-series seemed to be in most of my life - final year at uni I got to see 3 cylinder versions at Rover, remember being impressed with the modern materials used. Then, working, involved with designing machinery for production of cranks, and I've run a tuned version in my Caterham for 19 yrs.
Aftermarket cranks with worse balancing than production cast iron ones.
K-series seemed to be in most of my life - final year at uni I got to see 3 cylinder versions at Rover, remember being impressed with the modern materials used. Then, working, involved with designing machinery for production of cranks, and I've run a tuned version in my Caterham for 19 yrs.