Alex builds a Quattrini 252ccm Vespa engine 4 - stage 2 with exhaust test
In the fourth part of our small blog series, we make the following changes to our test engine: The cylinder is raised at the base with two 1mm spacers by a further 2mm compared to stage 0.5. This changes the control angles of the transfer channels from 124° to 126°. The outlet is adjusted to a control angle of 190° by milling. [...]