BOLT-ON CYLINDER KIT AND METHOD FOR INCREASING THE DISPLACEMENT OF AN ENGINE

摘要

A method of retrofitting a V-twin engine for increasing displacement. A cylinder replacement is performed by dismounting each of a pair of original cylinders from a crankcase. A pair of replacement cylinders are provided, each having a second cylinder bore diameter larger than a first cylinder bore diameter of the original cylinder to provide the V-twin engine with a second displacement greater than a first displacement of the original cylinder. A replacement spigot portion from each of the pair of replacement cylinders are aligned with a respective bore of the crankcase. The replacement spigot portion includes a second outer diameter larger than a first outer diameter of an original spigot portion. The second outer diameter of the replacement spigot portion and the crankcase bore diameter defining a subsequent diametric clearance smaller than an original diametric clearance of the original cylinders.