These scoots are carbed so No TPS. Ther was one post here that did have a cdi that would not rev. First time I EVER heard of that but it did happen. He tried freezing the cdi, and no spark> Thawed it would start but NO rpm's. Your boy may be right blue... Ask him to start posting! we need new punching bags here.
Jayyyyy Come out and Playyyyyy.