Vespa Performance Mods to a Stock Case and Crank
From Moped Wiki
these images are from vespa-ciao.nl. They give you an idea of what you can do by porting the intake and intake window and cutting the crank. enjoy.
File:Http://www.mijnalbum.nl/Foto-CWIAU387.jpg
File:Http://www.mijnalbum.nl/Foto-BKKX8S8L.jpg
File:Http://www.mijnalbum.nl/Foto-UFY4NFKO.jpg
File:Http://www.mijnalbum.nl/Foto-X4DCRDX4.jpg
File:Http://www.mijnalbum.nl/Foto-UUM3GTJL.jpg
File:Http://www.mijnalbum.nl/Foto-O86TPTXW.jpg
File:Http://www.mijnalbum.nl/Foto-AUIOGWGM.jpg
more pictures and pages here: http://www.mijnalbum.nl/Foto-AUIOGWGM.jpg
Here is Polini's instructions for cutting the crank, as well as installing it. http://www.polini.com/dep/PI88.pdf