Wasted 2-stroke tuning - Does all 'tuning' work? Lambretta & Vespa Tuning put to the test!
There are many well known and widely applied tuning methods used in building 2-stroke engines, When it comes to Vespa & Lambretta engines, some of those ideas have become practically entrenched in the mind of every engine builder and tuner. You know the ones, enlarge the transfers, match the ports, widen the spigot, radius the edges, match the gaskets and packers, cut the piston, etc.
In this video, we reflect on a 3-part series which ran across the March, April & May 2020 editions of Scootering, where Darrell Taylor put those exact tuning methods to the test on two different engines, and dyno-tested the results back-2-back. The first unit was a 175cc Lambretta, ported cylinder, with 28mm carb and clubman exhaust. The second, was a fully tuned RB252 motor, with expansion chamber and 35mm carb, kicking out 43hp. The results of this measured testing were quite surprising, and make for interesting reading!
Enjoy the video, and if you wish to read the full test and results in full, you can grab a copy of the magazines here: https://www.classicmagazines.co.uk/issue/SCO