Automatic Choke Not Working

[Wocketfast]

I have heard that you can clean the valve by
1. removing it
2. Filling with carb cleaner (you'll need to put your finger and thumb over the ends) and shaking
3. repeat 2. until the cleaner comes out clear.

[martin.herwitson]

Was a thread going a few weeks back on the same topic which should make things clear (page 7 idle chat) also a description of using a manual choke if you can't get the auto one working, hope this helps