Is it a big job to change your gear leaver spline. On a ktm 250 sxf

Its not to bad .You will need to purchase a shift shaft a shift shaft seal and a primary cover gasket and oil.First drain your oil.Remove your kick starter .Remove your primary cover.Remove entire clutch assembly.You will need air gun or a clutch holding tool to remove the clutch.Once you have the clutch assembly removed yuo can remove the shift shaft .Pay attention to the postion of the shift shaft in relation to the shift drum .Also pay attention to any shims on the shift shaft as that will need to be installed on the new one.Now remove the seal that the shaft was coming out of.Replace the seal install the new shift shaft.Make sure to center it in relation to the shift drum.clean every thing with brake cleaner.clean gasket area .Install the clutch assembly .If you have any trouble with the oriantation of the parts you can look at world of power sports for parts diagrams.Make sure you tighten the clutch hub to the proper torque spec.I would use blue loc tight on the nut as well .If you have a shop do it expect to pay about 2 hours labor max.Plus parts