K2 shutter not firing at the right speed

I've acquired a K2 in which the meter is showing the correct speed in auto and looks correct in manual, but the shutter isn't firing at the correct speeds - at least 1/30th and below (I suspect it's firing at the sync speed of 1/125th). The battery check LED looks OK and B is working fine.

Any ideas?

I have just acquired a KX with the same syndrome. I have compared the slower shutter speeds with my Spotmatic and MX, and the KX shutter is way too slow. My conclusion is that the shutter mechanism must be full of dirt, and that it therefore needs professional service. So I will send it off to Harrow Tech in the near future.

That is my best advice: Send it off for a professional clean-up.

Bjørn