these minor wud caused u a power lacking of hardtime,at the first thing...u lightened ur flywheel yet now ur using which type of clutch and pressure plate? assumed its oem original ur using,it does not support up that high temperature when comes to the certain revving and it loosing the grips den u probably will face a clutch slipped,overskimming also can caused dis as well..but the TB u had changed, err...u haftu double check whats the TB ur using now,the inlet size can make alot of diff..normally for 93..most of the ppl will choose mivec 60mm and perdana v6 ones,and did u rebored ur int.manifold when ur TB has changed? well if its not...there's no performance improvement to just plucking in a bigger TB..the mouth size arent the same,so its a waste ..and 93 stock 4-2-1 extractor isnt perform much anymore after u changed ur TB, the airflow already been restricted from the max limit that 93 can made..try to get a mivec extractor..its much more responsive compared to the stock ones,yet it more compatible to run smoother a/f ...u probably nid a piggybacks for tuning to balanced up ur fueling,ignition and airflow to match to ur current engine setting...u cant feel any better becos ur airflow setting already been messed up since the things u had changed... correct me if im wrong ..me 2 cents :D ...im from penang too...if u dun mind we can come out yamchar and talk bout it ... cheers