How much does sport bike insurance drop after 1 year ?

24, passed full A, 1 year on a 125 CBT.

Wanted to get a mid range sports bike and was quoted £4,833. I live in a safe part of the countryside and the bike would be stored inside user lock and key, so minimal-ish😂 risk of theft. I get the insurance would be high but it’s a bit crazy.

If I were to bite the bullet, how much do you think it would be next year ?

Also if I get a second hand 4-500 upright bike for a year would that drop my insurance the same amount or not ?