For anyone who is interested in DRZ modifications here is a good idea of what you can get out of the bike (research and tuning done by Burned from Thumpertalk) :the tale of a 57hp 05 drz sm.NOW 60 HP 10/31/08
SEE POS #304 10/31/08 FOR UPDATES
finished the final stage yesterday on jonathans sm.
the following graphs show every change we made.
run4= brand new 0 mile stock 05 sm with corrected main jet for 5500ft
run16= added akra full ti system (it was chosen against my suggestion,because it looked cool )
run33= 3x3 mod,dj kit with correct jetting
run50= added 39mm fcr,with correct jetting
run61= vp ultimate4 fuel test
run76= 94mm big bore (starting to have high rpm cylinder fill issues,cams needed,pipe becomes suspect)
run86= hotcams stg2 intake stg 1ex (getting better,really start to suspect the pipe isnt flowing)
run95= added 41mm fcr,with correct jetting (we were suprised at the gain,however the pipe is really choking)
run111= added yosh ti trs (proved my initial suspicions).
run147= added +5mm hotrods crank,RHC 187 cams (degreed),my own porting with over size intake valves only.


FCR adds around 5 hp. 440 kit another 3 hp. Hotcams 2 hp. With 470 kit, RHC cams and bigger valves a whopping 11 hp jump !