200x motors weak points?

[tdup]

Not counting the connecting rod what are the weakest points in the 83-85 200x motors under heavy modifications.

[250sx]

from what I've seen the weakest point on all of these motors seems to be the kickstart mechanism. there are a bunch around here running around with 185/200 auto-clutch transmissions b/c of that.

[200xjapan]

Cylinder since it is bored to it's max. If you bore the 200 motor more it is bound to fail because the sleeve is already paper thin.