Have had them on my sv and I don't like them, wish I'd paid the extra couple of quid for my usual road attacks.
The SV's back squirms in the wet when going around roundabouts which it never did before.
Check your tyre pressure and play with the rear shock settings

Each tyre has a different belt bias and behaves differently plus you have more miles on the stock rear shock which on a Sv has a short life as they save ££ on that side of things and there a cheap and cheerful shock with harldy any adjustment .
Shocks and forks should be serviced every 10k miles fork oil replaced .
I used all sorts of tyres over the years and found Maxis as good as the rest out there .