i would think the f5 the whole way; lighter and the track on the 600 is ALOT bigger.F5 S/P or Polaris switchback 600? Off the line to where?
F5 is ods clutch kit and 1.35 track with 104 1.5 studboys and 160# rider
Switchback is 1.375 track no studs, stock and 190# rider.[/b]