How can I fix my Peugeot speedfight electric start?

Hi, I have a Peugeot speedfight 2, 01 liquid cooled
the bike broke on me tonight and I've been browsing every website I could, tying to find an answer on my problem
my bikes electric start spins the bendix but just makes the electric start noise with no catching onto the cog, doesn't catch onto anything, just keeps spinning, not sure whether I need to replace the bendix or I need something else?
I've looked at starter relays, new motors, but as the bendix spins round I'm guessing it cant be anything else but that
help please?