I am flooded with calls and e-mails about the tillotson carb approval for AKRA. Here is what I can tell you as of right now. If the carb you currently have is legal by the current written rules as per the written specs, the carb is approved. However, be aware that there are some that are not in spec. AKRA is aware that the PK1 is a legal carb. Some of the PK1b carbs have issues that AKRA is working on determining approval. We will keep you posted.