Posted on 22 Oct 2025 Featured Image Expansion chambers for performance tuning on vintage rigs vintage scooter expansion chamber two-stroke tuning Vespa performance Lambretta exhaust classic scooter restoration Expansion Chambers for Performance Tuning on Vintage Rigs Why a hand-bent cone of 1960s steel is still the cheapest horsepower you can bolt to a two-stroke scooter. Related Reading: Expansion Read more