Yeah I'm thinking that the 29cc might be a bad idea, I've been doing some other research for the last little while...do you think that the 27cc head kit motor from Oneill Brothers would have a better power band along with my Jetpro pipe or should I just get another 26cc Zenoah to go along with my pipe? Thanks a lot for the help guys, I probably would have gotten the 29cc and would have been dissapointed.