Whats the track conditions exactly? Title says hard packed dirt..i think of tight clay when i read that. Like flattrack/TT. Think about running a set of american racers? Made to powerslide the corners and accelerate on the straights. If its that hard packed...might be worth trying.
1999 400ex -- Sunday driver ----****SOLD****
Wiseco 426. 11 :1, Hotcam Stage 2, Curtis Sparks X-6 full exhaust, Houser 450r Probounce nerfs. (black silvervein) Holeshot GNCC's on T-9 Itp baja, Maier carbon fiber plastics, Houser antivibe stem with Renthals/ODI Rouges, Lonestar doublerow carrier, 170 main no lid -- 50/50 turbo blue and 93. '07 450R shocks
2005 450R -- The Sleeper --
Bumped up compression, stage 2 hotcam,hotrods bottom, Dasa full system, uni filter and jetted, stainless brake lines, rath nerfs and heels, quadtech hood, Fluidyne radiator, ported and polished, houser grabbar, Hinson'd out.