I'm riding a Honda CB600F Hornet built 2006 (last model with carbs). I put it away for the fall/winter about 6 months ago. This week I was doing the maintenance, cleaned the brakes, lubed cables, synchronized carbs, changed the oil etc.
I noticed accidently I could put it into gear (first, second etc.), without using the clutch, while running. Obviously this isn't right, so I checked cable freeplay, tried readjusting, didn't really make a difference.
After some fiddling around (possibly due to cable adjustment?) I can't put it into first gear at all anymore (not even with clutch), but I goes up to 4th without the cluth again. 5th and 6th won't work at all. If it shifts, it will stay in gear though, so the clutch isn't slipping. Is it sticking? I'm thinking of opening the transmission and checking the plates etc. but I'd rather avoid this if another option is available.
Very strange situation, I'm not sure what can be causing this, especially because I didn't have this problem when I put it away for the winter...
Could this be the transmission plates that need replacing? I'm sure I put in the correct amount and type of oil.
Any help would be appreciated.
EDIT: To clarify, this behavior occurs while the engine is running