I will not go into depth telling you how to build a lambretta engine because i no more about vespa engines, so all i did was use (Sticky's Book on Lambrettas) and asked for help from my friends anyway. As i was going to replace the crank it was decided that i would use a GP one as it means i can use a stonger GP flywheel, this was fitted with F.A.G bearings and good quality seals. I have been very lucky with the gear box as it was fitted with an italian ratio one and not the usual spanish one that have a bad third to fourth difference, again new bearings and seals were fitted
