quick view Add to Cart Yamaha AT90 2 Stroke Twin AKA "The Jet Twin". MSRP: £1,350.00 Yamaha AT90 2 Stroke Twin, Commonly known as "The Jet Twin". These rare bikes top speed is 62mph, 4 speed gearbox, 8.2 hp and is Autolube. Centre and side stand.This bike can be restored or use as is. Needs front brake shoes and cable, we have not... Add to Cart Add to Wish List Add to My Wish List Create New Wish List