Your engine is a form of Villiers/JAP hybrid , and should have a BV1320 Carb fitted , it most definately has a choke fitted(or at least should have) , have a look at the bottom of the Carb where the air filter pipe would join on , you should see the choke strangler there , the actuator was plastic and prone to breakage.
This Carb does not have a tickler.
Get back to us if you’re still unsure.
Andy.