Its starting to sound like Whizzer has alot of fans. Its like the big block of bicycle engines. Im thinking that a throw away might be in order for now. I will go with the Whizzer engine later, its a matter of finding one and the right one. Bout $800 is what someone told me sofar. And was also told that some real cool parts for them are out there. For now though, a lil "wing ding ding ding" will hold me over. I need to know who has the good one? 47mm bore x 40mm stroke = 70cc?