GT186 power output

Hi,
I am putting a GT186 on my S2 150 with a clubman exhaust and a 25mm Dellorto with a remote filter. What sort of BHP should this kick out?
Cheers
I am putting a GT186 on my S2 150 with a clubman exhaust and a 25mm Dellorto with a remote filter. What sort of BHP should this kick out?
Cheers