I have problem downshifting from 2nd to 1st gear. The clutch has to pull all the way in, the lever is touching the bar. If not, the gears feel like grinding together. Even the lever is all the way in, 2nd -> 1st isn't smooth at all. Beside 2nd-> 1st, and 1st-> 2nd upshift, I can do all other shifting with a very light touch of the clutch level. So, what is the fix?