I have 6 cats at home, so maybe I can give some suggestions to
this.... but pls.... don't strangle them.... cruelty to animals,
whether domesticated or otherwise can land you in jail
too....
cats usually do the scratching on rough surfaces, is your seat the
mor-peng type?
also scratch before or after sleep.
do you park on main stand or side? if your bike is on side stand,
slanted enuff to make it uncomfortable for them to sleep on, you're
ok.
hide some medium to large rocks around your usual parking place,
after you park, put the rock(s) right in the middle of where they
use to sleep/scratch to make it inconvenient for them.
dunno how true, but, some pple believe that if animals like to
sleep on your properties, you have 'fu qi' or good fortune, like
someone is watching over you like that lor...
so take it with a smile lah.... maybe its really something good
lor....