Vespa GT125 2 port clutch gear upgrade
Posted: Tue Feb 09, 2016 1:42 am
Hi im restoring a Vespa 67 GT125, planning on putting a cast Pinasco 177 kit on, however i understand the clutch cog can be changed to alter the gearing, SIP do several different sizes and I can't find the most suitable size to use, many people must have done it but can't find anything on web, can anyone help?