rhythmfiend

Hi, anybody fancy helping a newbie out? i recently went from an o5 250 pro to a 2011 280 which already has a fly wheel weight, really wanted a 250 but it was goin cheap and i couldnt say no. the bike feels really good and i'm getting on with it but it feels a little bit too powerfull, i can manage but im very aware its a 280, can any of you guys advise on how i could tame it down a bit, have read about the reed block spacers, head spacers & slow action throttles but would like to know how much each option will effect it before i decided which route to take. Cheers.