This Ctek tester gives you CCA and for the bad battery he reported 150amp and that's according to the spec for this Bosch battery. This tester is a quick tester, will just drain the battery a short time and then estimate the CCA based on this. The old school type, I have used this one as well, drain ~100amp during 10 seconds and after this one should look for the current voltage. Also this showed a working battery.

My guess right now is that one single complete drain, due to heated grips were on during 3 days while the bike were shipped to me, destroied the battery somehow. Some internal discharge increased when battery are subject to the smallest external drain. Do not know if this makes any sense?

Anyway before putting the bike together again I installed a relay for the heated grips aswell as the power socket and future led lights I plan to pimp the bike with.