exact battery replacement for 82 GPZ 750

Can someone tell me the exact battery replacement for the 1982 GPZ 750 R? I think the correct battery is a YB12 A or something like that. I know the YB14l-a is incorrect. Any help is appreciated.
If you also know the dimensions that would be great also. I have found following dimensions. Are these correct?
Length 5 5/16"
Width 3/3/16"
Height 6 5/16"

I purchased the bike without a battery in it. I am now trying to locate the correct battery. it seems that the 82 GPZ 750 battery is a one year item only. Thanks

I have a new, unopened and correct Yuasa for the 1982 GPz750 , but at home. I'll check it tonight.

McDroid, that would be great. I am sure you have already encountered the dilemma of finding the exact replacement for these classic bikes. So, if you can give me the exact battery number along with all of the dimensions, length, width height etc. I would greatly appreciate it. This forum is a wealth of information for dealing with old bikes.

The battery I have is a Yuasa YB12A-A with sensor. Dimensions are:

Length 5 3/16"
Width 3 1/16"
Height 6 4/16"

This may be a difficult battery to source and it is an odd one because your bike requires a sensor battery also. Suggested replacement batteries all appear to lack the sensor...it is possible to ground the lead from the display so it doesn't blink endlessly in the absence of a battery sensor.