Sip sound at 0:38sec. Hard to get the right sound on video. The Sip Road definitely sounds louder and better.
The performance gain is especially noticeable in 2nd and 3th gear where you can rev it up higher than before. At max speed in 4th gear you gain about 7-8km/h*
*Update: After driving more, I have no problems hitting 100-105 (114 max ever), so that a massive gain from de 90kph I hit before
Changed the main jet, and started at 100 (stock is 96). 2+ is recommended but at 100 it runs super smooth, no smoke, no hesitation with WOT. I think i'm going to leave it like this.
UPDATE: I changed the jet to 98 as it appeared to be too rich. My spark plug was to dark and I started to have trouble at higher speeds.
During installation i noticed the fit of the sip road did not match the vespa. The problem and solution can be found on this link: http://hkfabricator.com/siproad.html
Vespa PX 125 Stock exhaust vs. Sip Road Sport 2.0
