I did kawa zzr1400 last Sunday.Very sexi bike i must say.
I have to probably change cam chain tensioner because of rattle occuring when starting up.12k mileage so probably stock one is worn out.

hi and welcome wowerman!
by the way, the cam chain is hydraulic self adjusting, a rattle is normal for the first few seconds until the oil pressure builds up, but by all means get it check if it makes you feel better! my bike has 42000miles and has this 'feature' from day one!