Yes it sounds like you need a rebuild kit which includes the needle HERE is one of the kits, providing it is a walbro carby. If it is a Zama carby then you will find information on it HERE.
You will find more information in the parts list and manuals area on how to replace the diaphragms as well.
Regards,
Bruce
Please do not PM me asking for support. Post on the forums as it helps all members not just the individual.