Originally Posted by Pleiades

This is most definitely NOT normal.

I still have (crap ) OE Yuasa battery on my 2008 XTZ and it starts first time every time without fail even when left for several weeks during the winter. I do put it on an Optimate now and again on the rare occasion its left for a month or more in the winter.

As cca suggests, check to see if there is a spurious current drain when the bike is left standing. When the immobiliser's LED is flashing the current drain should only be a few mA and when it's in stand by mode (not flashing) it will be even less. Yours must be more than this? I see you have a USB charging point fitted - you do realise that most of these draw current even when nothing is plugged into them so really need to be ignition switched or have some other means of turning them off when not in use. Is it connected direct to the battery?

To check for current drain, disconnect the positive terminal from the battery and connect the probes of a multimeter set to read 20A between the lead and battery post. Gradually one stage at a time check the display and if no reading is present then reduce the setting in steps from 20A down to 500mA each time checking to see if there is a reading. When you get a reading stop and make a note of it and let us know what it is.

DO NOT turn the ignition on at any point whilst doing this. DO NOT take a short cut and start at 500mA either in case there is a big current drain you are unaware of.

TBH, the above test should have been the first thing any good mechanic/dealer technician would have done when you first took the bike in with battery problems. They should have also checked the charging current and voltage too - did they?