At this time, I believe there are few bad samples in every brand. Frustration arises when we circle the wagon because we don't have the resources to prove what or where the problem is. The next challenge is dealing with the sellers and warranty claims. Some companies honor warranties until they are presented with evidence, for other companies the word of the customer is enough evidence. The later are companies that promote and develop loyal customers. While some people persist and find solutions, others give up and never purchase again from a particular brand/model.

Anyways, I am sure this has already been the subject of other threads.

In regards to my sk carb, I will call Kangke and will try to get a warranty carb for my engine. On the other hand, I own an SK-50 that ran perfectly out of the box. Anyways, I am buying another SK-90 for another model. I truly believe this one will perform fine out of the box.