People are lazy,they want a good result without working for it, a 450 on a local track riders make 1 shift,sometimes 2 if there a long straight away.They don,t have to slip the clutch and shift constantly, and be all over the bike like riding a 125. Lap times don,t lie, look at L.L. school boy 1-125 class, has lap times that puts them in the top 5 in 250a and 450a pro sport, that class is riders that raced nationals and supercross in the past. Riders used to buy a 4-st. so they could get a better result, but then everyone bought 4-st.s and there advantage was gone,then they quit riding. And the tracks now get very low turnouts, the local track that I,m a member at, didn,t work the track since May,s last race,and don,t cut the grass because the tressure says there,s no money for lawn mower gas. So the track is problebly going to shut down, because of the losers that bought 4-st.s, and don,t want to race,or ride, or work at the track.