Lambretta Performance Tuning and Conversions should be essential reading for every Lambretta owner.Features basic conversions, and even the 250 cc AF S-Type conversion.
The Unofficial Lambretta Manual Update by Mark Haines
LAMBRETTA - ILLUSTRATED GUIDE TO THE IDENTIFICATION by Vittorio Tessera
Lambretta Tuning Manual by Dave Webster - 8099992
Lambretta and Vespa Street Racers BOOKAZINE by Stuart Owen