With your clutch cover off, try turning the sprocket mechanically with a piece of wood or a pair of pliers with a cloth or piece of rubber to protect the sprocket etcetera, and see if the engine turns over. You should be able to hear it if it turns over the sound is like a metallic cough or wheeze almost, pretty much just the sound it makes when you start it up basically.
If it does turn over your Woodruff key is probably not an issue.
Clean and reassemble. Now try to ride it and see, does the engine turn over when you in let out the lever & let the clutch engage?
[EDIT: looks like it was the woodruff key - nicely solved!]
If it does turn over your Woodruff key is probably not an issue.
Clean and reassemble. Now try to ride it and see, does the engine turn over when you in let out the lever & let the clutch engage?
[EDIT: looks like it was the woodruff key - nicely solved!]