The Megola.Putting a radial engine in the front wheel was a bit daft but not as daft as the rest of this list.Self-Retracting Side Stands.Made redundant by a microswitch, thankfully.Turbocharging.Making slow bikes faster for years. But do we need to make fast bikes faster? .Self-cancelling indicators.Ironically, Harley Davidson makes the best.Indicators in Hand Guards.Genius idea: make something designed to protect you in the event of a collision as expensive to replace as possible.Single-Sided Swing Arms.Disadvantages outweigh the advantages, unless you own a Honda NC30, then it's all right! .Underseat Exhausts.Keeps the weight high up and cooks your ass. Great idea! .Lean-Angle Indicator.Because what you really need to be doing in a tight or fast corner is looking at your dashboard.Built-in Satnav.In the age of connectivity, this seems so outdated .Keyless Ignition.Bulky, never in the pocket you think it is in and costs a fortune to replace.