Sometimes during downshift my 2005 C90 wont go into first gear. Downshifting while moving, no problem but downshifting while stationary sometimes won't go.

 

I have the same issue. Strange.

 

Funny thing... My 2018 C90 does this while stationary and what I've come to find is that If i release the clutch and then squeeze it again and it will go into gear with no problem. Another issue that I have is that when shifting from 1st to 2nd gear, more times than not the bike shifts to neutral instead of 2nd gear.