barbagris
Mad Scientist
- Joined
- Aug 1, 2010
- Messages
- 12,988
- Location
- On the verge of insanity
- Ride
- 1979 Guzzi V1000G5 - 2018 KTM 790 Duke
ime This is NOT what rots first. Usually it's the soft foam used twixt fabric liner and Polystyrene. My missus almost never gets on the bike any more - and usually when she decides she wants to we find that the soft foam on her lid has perished - so we get a new lid and ......................................................Mine both show no signs at all of hardening of the polystyrene expanded foam as seen with old used helmets.
I have seen similar things with the spongy midsoles on shoes/boots. One day for no apparent reason it turns to powder.