Post by mijapxman on Nov 19, 2018 17:04:00 GMT
A small follow on from this these 👇
vespa.proboards.com/thread/7228/engine
As I couldn't find this 👇 at the time of the above discussion, this from years ago, which may be relevant if you want to tune .
sites.google.com/site/drunkmunkey6969/p200mildexhaustporting
Mij☺