free flow exhaust on MP3 500
Post Reply    Forum -> Project Reports
Author Message
Lurker
Piaggio MP3 500 2013
Joined: 23 Dec 2018
Posts: 4
Location: Leigh on Sea
Tue Jan 08, 2019 4:37 am quote
I am in the process of experimenting with exhaust systems on my MP3 500. I have a free flow exhaust on at the moment. I have found that the top end road speed and RPM has dropped considerably. At a flat-out top speed of only 70mph the engine top engine speed is now only 6000rpm. With the standard exhaust system I could trace a much higher road speed with engine speeds up to 7500rpm.

Has anyone else experienced this?
Ossessionato
09 190s taormina
Joined: 08 Apr 2010
Posts: 2069
Location: Googleville
Tue Jan 08, 2019 4:06 pm quote
Two possibilities. One that you are actually down on power either from less than optimum pipe length or diameter or ECU inability to correct fuel. Or two peak power is now at a different RPM and need to adjust roller weight accordingly.
Your Rally Here   Vespa Wasp Pin Badges   Scooter Parts Company
Post Reply    Forum -> Project Reports
[ Time: 0.2461s ][ Queries: 23 (0.0514s) ][ Debug on ]