@BobVance asked a question on another thread Morettini and Ubileen early pear harvest - #14 by PaulInMaplewood on how to know when the small yellow pear gets ripe. Below was my response
The small yellow pear is very high quality but not prior to ripening is not. I use my thumb and push into the pear and wgen its ripe you can physically feel the give in the neck. The green gives way to a slightly liggter greenish yellow color. A few pears ripen and drop before others not due to insect damage just the nature of the tree. The tilt test is effective but not until the last minute. Insects that like sugar begin to arrive such as wasps and beetles. There are so many i eat one and look at the seeds color. In addition to all that it ripens early summer so i use other easy to pick pears as indicators.
I may not always be around so in case im not remember share this pear for free when you can as i did. Once you taste it you will know why i said that if its suitable to your climate im confident it will be your highest quality pear. The first couple of years it produces fruit they will not be its best quality in fact in the case of my first tree they were awful. Normally i would have top worked it but got busy and didnt and was also curious about it. The tree is thorny when its young but as it ages it wont be. If all that was not unique and strange enough its final unusual trick it can do is bloom a second time and still ripen very tiny fruit before fall. Thats useful on years like this where the crop is scarce due to a killing freeze of the blooms. Im on the verge of some huge break throughs with pears and apples. If im unable to complete my work with this pear i put it in the hands of others on this forum. I always gave it away free of charge because these unique features make the genetics of this pear very important to the future of all people. Some things in life go beyond ourselves and the seed crosses of pears and apples im working on will be incredibly important for the future of everyone.