Manual engine rotation

[MotorradMike]

I've tried to figger this out myself but... So it's time to ask.
Why is it so important not to manually rotate the boxer backwards. Lots of places warn against it but don't say why.

[BubbaZanetti]

I've tried to figger this out myself but... So it's time to ask.
Why is it so important not to manually rotate the boxer backwards. Lots of places warn against it but don't say why.

cam chain binding, the tensioners don't tension in reverse.

[MotorradMike]

OK, thanks. I'll continue to go around again when I miss the mark.