Four months ago i bought a used motorcycle (FZ8 Fazer non ABS model) with 5000km on it. These kilometers were traveled by the previous owner in a period of about 4 years (VERY light use) and for the last 12months before i bought it, it was almost not used. Since then (4 months) i 've made another 6000km on it with no issues at all. I knew in advance that at some point i would have to change the tires since their rubber would be dried and stiff but since i consider my self an experienced driver (with over 200k km in my history) and since the last four months was a quite warm period (summer in Greece) with temperatures about +30C i decided to use the old ones at least until winter. Roads in Greece tend to be very dry throughout most of the year with quite warm surface and still quite slippery, especially in urban areas. Once again i would notice that i have quite an experience with the bike and i am able to perform more "extreme" handling on it. The last month i had three cases of slip on my front tire all on moderate braking application all of which i was able to handle quite easy and avoid any fall. I will anyway change my tires very soon but i would like to know if this is mostly due to temperature changes from the upcoming winter or due to some rubber property which was not so obvious after riding again with these tires but after 6000km is now more obvious.
Edit (to clarify further): 1) I know and completely understand the risks of riding with these tires so please lets move on to the QUESTION. 2) The tires ARE the stock ones, so yes they are even older (about 2012) 3) They WERE properly (as much possible) stored and they had NO cracks or traceable issues (i had a test ride to decide if i should immediately change them) 4) They STILL don't have any (current excluded) after 6000km 5) Their traction-cornering behavior (after getting a little warmed up) is quite impressive to me given all of the above info
Maybe i should move over to chemistry.stackexchange.com !?