on the new boots i suggest wiping them with 303 aerospace protectant...and D should absolutely honor the warranty (assuming you are within it) esp of a NON wear and tear part like this...
and i have ridden the bmw and there is no comparison in terms of fun faktor : for me the duck blows the beemer away....
I've tried the 303 on mine from day 1.
It didn't work.
The rubber boots literally rotted away within 12 months.
I submitted a warranty claim, on the issue and it was flatly refused.
I fought the issue in the nicest possible way, and the importer sent me a set of rubber boots off a race bike.
Ultimately, the original ones virtually fell off within 2 years , and I had the dealer replace them with the ones supplied by the importer at the same time I had the "Fuel Injector Parameter" update installed in April.
I haven't used 303 on this set since, and they're holding up fine.
I was wondering if something in the 303 was having a negative effect on the original rubber boots.
It's funny though, because all the other rubbers are fine.
I think it may have been a bad batch, or a change of supplier which led to this issue.
For everybody's information, the same rubber boots are used on my older(2010) model Streetfighter, and they're holding up beautifully with 303 on them.
Sadly one cannot buy the boots alone from DUCATI as a spare part.
They could easily sell them singly as a spare part at a reasonable cost for people who want to renew them.