To simplify the engine and lessen fees, the V-twin ignition was designed to work with a single set of factors and no distributor. This is referred to as a dual fire ignition system, triggering the two spark plugs to fireplace no matter which cylinder was on its compression stroke, https://harleydavidson35555.liberty-blog.com/31159931/harley-davidson-things-to-know-before-you-buy