Custom Alta Redshift by Walt Siegl

As told by Walt himself

Mike Mayberry contacted me several years ago to order my Bol d’Or model. Soon after, he placed an order for a Leggero, and since I involve my clients in the decision making about their builds, I got a chance to get to know him via phone. Once we met personally, we realized we have a lot in common. Mike is the founder of Ronin Motorcycles, which in my opinion represents the quintessential all American performance bike.

Walt Siegl custom electric Alta motorcycle

During a visit to his workshop in Denver, I had the chance to ride several electric motorcycles he owns. I was so impressed by the sensation, I decided that my next design challenge was an electric bike. I had already been thinking about building something smaller, something that represents the future, something with two wheels that many people have access to, even without a motorcycle license; maybe a moped or a scooter, something relatively affordable. Even before I test road Mike’s electric bikes, I had been interested in the e-motorcycle challenge: to create a machine that is devoid of all the familiar components that make up a combustion engine motorcycle.

Walt Siegl custom electric supermoto

Mike Mayberry is an industrial designer and I greatly admire his talent. I’ve enjoyed many conversations with him about design in general, and how it effects people, about motorcycle design, the motorcycle industry, and the future of two wheel transportation. I recognized in him the same urge to search for the right answers for good design by getting out of your comfort zone, and then when you arrive at that edge, making a better informed decision about what is best for the project. He also happens to be an absolute wiz with mechanical computer programs. Since I wanted to embrace the most current technology in designing an electric motorcycle, I asked him if he’d be interested in collaborating with me.

We thought it might be smarter to start with a donor bike, since we’re both very opinionated as designers, and we needed to see if we could work together long term before diving headlong into a ground up project that would include the development of a battery pack and an electric motor.

Alta custom motorcycle - Walt Siegl

Both of us saw this as a possibility to design an electric bike that we would both want to own: An urban Enduro.

Using ALTA as the donor for its battery pack and sophisticated hardware/software was an obvious choice since ALTA achieved great success over the years as an electric bike company that was truly competitive against race bikes with combustion engines.

Walt Siegl custom electric Alta motorcycle - left side

The key design decision that we made was to fully embrace the battery pack as the power source for the bike, instead of hiding it. We wanted to celebrate the essentials of the electric motorcycle. Mike and I agreed that our design aesthetic would resist the impulse to create novelty, designing something honest, user-friendly and durable, while using as few components as possible. So there is no mis-understanding of what this machine has been designed for: pure business. From the get go I wanted to design a modern looking machine, that is visually understood as E-Powered.

Walt Siegl custom electric Alta motorcycle - rear

The key performance decisions: It had to be as light as possible, but stand up to rigorous use. It had to have precise handling and the correct ergonomics for optimum performance. We changed the dirt bike geometries by designing our own chrome moly frame, so Ohlins road bike forks could be used. We designed a structural carbon fiber subframe and carbon fiber bodywork. For the prototype standard woven carbon fiber sheets were used. For the remaining 8 bikes that are being built, the woven carbon fiber parts are being replaced with forged carbon components. This material not only lends the bike a modern feel, but it is also very strong.

Custom Alta electric motorcycle

In addition to the carbon fiber bodywork and frame, we also designed and produced triple trees, taillight, wheels, foot controls, and a new swing arm that helps achieve the geometries and handling that we were after. We had a tight deadline to finish the prototype for the Electric Revolution show at the Petersen Automotive Museum in LA, so it still has the donor bike swing arm. We had only three months to design and build the bike. I started by sketching the principal Gestalt of the bike in pencil, and then sharing that design with Mike in front of his computer over a weekend to create a principal computer model to work with. Most of my evening hours were spent sketching various options to share with Mike via text and emails and several hundred hours of phone calls 😉 He was left with the tedious task of converting my paper sketches to computer models. My lead tech, Aran, and I were left with the task of finding mechanical solutions for all the design elements. Plugs for the carbon fiber molds were machined out of urethane. Some of the components were 3D printed to check fitment and then turned into useable parts.

I think that electric bikes have a strong future. Young people especially always embrace the romance and fun of traveling on two wheels. Newcomers to two wheels don’t have the reference to combustion engines, therefore they won’t miss them.

E-power distills the riding experience. There is no sound other than the wind, which kind of translates to “I’m moving.” It’s the next best thing to flying. I feel like I enjoy riding even more because it happens in the silence. You’re not preoccupied by anything else but forward motion. Because of that it feels awesome. I feel like it even has the potential to make me a better rider, because I can fully concentrate on what the bike does underneath me. I think all of us wool and dyed motorcycle riders should at least try an e-power bike once, to form our own opinion. I’m fully aware that electric powered technology is not the final answer to our planet’s pollution problems, but I see it at least as a step in the right direction. We should all be coming together to help support the advancement of clean technology in whatever way we can. — Walt Siegl

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Photography by Gregory George Moore


Triumph T140 Cafe Racer by Woolie of Deus Ex Machina

Most motorcycles belong in the garage. Few are home-worthy.

This is one of them. Michael Woolaway’s artistic creation, a classy 1978 Triumph T140 dubbed "The TTT", will be getting the royal treatment as a centerpiece inside its new residence near San Diego, California.

But Woolie really only builds bikes for one purpose: Going. And damned good too! For him, if it doesn’t perform well, then what’s the point?

The motor is a ported and polished 750cc T140 with all the trick racey bits — Megacycle cams and lightened lifters, bevelled and drilled cam gears, chromoly push rods, and 7mm Kibblewhite hardened valves with modern guides and seals. Handmade intake runners accomodate big gulps from two 34mm Mikuni flat-slide carburetors with velocity stacks.

The frame is one of only two handmade by C&J specially for this motor, with a wishbone section at the lower part of the oil-in-frame backbone to allow for a central monoshock and eliminate the need for an external oil tank.

The long angular aluminum tank Woolie made by hand is styled after Japanese Grand Prix racers of the 60’s and the paint is a black candy over black basecoat, producing a striking wet mirror finish.

To keep true to the slim vintage GP feel of the bike, the same tire is mounted on the rear wheel as the front, 17″ Bridgestone BT45s.

The custom stainless steel exhaust is ceramic-coated in matte black and uses a Cone Engineering megaphone. Paired with the iconic guttural thump of the vintage British parallel twin, the sound is pure nirvana.

The TTT Specs:
-Triumph T140 750cc
-Mikuni TM34-2 flatslide carbs
-Handmade aluminum tank and seat cowl
-Carbon fiber front fender
-Rizoma rearsets
-Motogadget control unit and gauges
-LSL clip on bars
-Tubeless spoke wheels
-Bridgestone BT45 tires
-Ohlins forks
-Rear suspension by Jimmy Wood at Moto Station
-Beringer 6 piston front caliper
-Brembo rear brake
-Saddlemen seat

Special thanks to MotulSaddlemenRizomaSHOEI, and Bridgestone for their support of Woolie’s Worshop and this project.

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Photos and words by Deus Ex Machina