First seen in the Freeway magazine custom show at this year’s ‘Verona Show’ (Motor Bike Expo, Italy, January 2011) Apocalypsis 7.3 by EDSpecial is a showcase of original design and engineering craftsmanship EDSPECIAL set out to build Apocalypsis 7.3 as a ‘concept bike’ to show what the shop was capable of in terms of design and custom fabrication. The thinking behind the bike’s look was to build a machine which runs a 360-section rear tire without it looking out of proportion with the rest of the motorcycle.
The first step was a set of hand-drawn sketches, which were transferred to CAD designs to ensure the ideas that the team at EDSpecial wanted to incorporate would all work. Once the design was finalized, construction began with the shop using 48mm tubing for the frame in order to keep everything in proportion. The custom frame has 48 degrees of rake and features a single-sided rigid rear end. The wheel that is held in place by the single sided frame is actually made up of two rims which have been split and welded together in order to get the width necessary (15.5in) to mount the V-Rubber 360-section tire.
Rather than offsetting the engine and transmission to allow a drive belt or chain to clear the over-sized rear tire, EDSpecial has created a friction drive system. A right-side drive gear box is connected to a short drive chain that mounts on the end of a transfer box that inverts the direction of the drive and allows the friction roller to turn the tire in the correct direction. The other side of the transfer box mounts a brake rotor for the rear wheel braking.
The unique nature of the bike’s design is continued at the front end, where the team at EDSpecial constructed the USD fork from billet aluminum and then covered it with a skin of steel made up of 40 individual pieces welded together. The cover also incorporates the handlebars, which themselves have been inverted. At the other end, a 17 x 5.5in wheel has been built around a Honda FVR rear hub to carry the 180-section tire, and two Yamaha R1 brake calipers provide the stopping power.
The space between the two extreme wheels on Apocalypsis 7.3 is filled with a 1,200cc H-D Sportster motor fitted with a Mikuni carb and a set of EDSpecial exhausts. The primary is a 3.5in open belt with a carbon fiber cover that is connected to a modified Ducati 1198 hydraulic clutch.
Above the engine, the gas tank is split in two with each half hanging on either side of the frame’s back bone. The gas tank has been internally sectioned to allow it to also act as the oil tank. The paint which adorns the bodywork and frame was chosen to match the name of the bike and is said by EDSpecial to look like:
“After being buried under the ashes nuclear Apocalypsis comes to light, like a relic.”