tzr125 r

Hi everybody my name is Karl and I'm new to this so please bear with me. my dad got me a tzr125r which wont start the generator had been removed as with the carb. we have a spark, petrol getting to the plug and compression, but it wont start. we have replaced the l/h crankcase seal because it was weeping, replaced the generator with the woodruff key, the carb is a DELLORTO which we found the circlip on the centre pin loose, the circlip has been placed on the 4th groove down and a washer placed under the clip, however we are unsure of the float height setting, does anyone know this setting ? is it 22mm ? and has 2 seperate floats. can anyone help or have any other ideas why it wont start ? many thanks for looking, Karl