New 2013 EFAB Chopper Underway

I have been involved in the planning of this bike for quite a while now, but construction has officially started.

comb chamber

I am always experimenting with how my mind works when building bikes in different orders. For example, my first bikes were made mostly from the outside in; drawing the completed bike, then buying a motor, trans, etc and working inward until I achieved what I wanted.

comb mold level

As my motor building knowledge and skills have increased, I have began to build more form the inside out- starting with the bore and stroke, compression, type of case, etc. Then building the frame around the engine, then adding wheels and sheetmetal to it.

burr king 1

Since I cant escape my own brain, creatively, at least I can trick it into thinking differently by changing these processes purposely.   Also, I want to have maximum control over what is happening inside my motorcycle, and the only way to achieve that is to start at the heart and then grow outward.

lathe 1

The motor for this bike is a combination of what I feel are the best characteristics of and HD evolution and a twin cam, in one motor. I am combining the undersquare evo dimensions (3.5″ bore and 4.25″ stroke), with the superior flywheels, bearings and oiling system of the twin cam.

lathe messy

After riding many different types of motorcycles, there is something I like about the small bore and longer stroke of shovelheads and evos. Obviously every motor combination has its pro and cons, and the twin cam 88 and 95’s are amazing engines. However, twin cams never seem to have that “break your neck” torque that evos have right off the line. And I don’t think they sound quite as nice either. In reality, these observations are just an excuse to engineer something you cannot buy.


The bike will also be a tribute to some of the bikes that I loved when I started building in the late 90’s. I always liked NYC style choppers, early Indian Larry, Steg, Psycho Cycles, Queens County Cycles, etc. That influence has been in all of my bikes, but especially this one.

tube notcher

The frame is made entirely of 7/8″ chrome-moly tubing. A smaller diameter than most frames, but the end result will be stronger than a typical rigid frame of larger material. Chrome moly is an amazingly strong steel, used extensively in the motorsports world for chassis work.

axle plates


I am often asked, “why do you build these elaborate, expensive motors when you could simply buy a new one?”. The answer is that I am dedicated to being a motorcycle builder in the truest sense, and without getting “inside” the motor, I feel as if I didn’t go “all the way”. I need to understand exactly how my machine works. I am a very visual person, so for me to understand something I need to hold every part in my hands and see it work. Once I began to understand, exactly, how these engines worked, it was impossible for me not to change them.

I am at a point now where the rest of the bike is simply being wrapped around my engines. This is a form of bike building that I have always been trying to achieve, but didn’t know it for a long time. I think that this is the main reason why the majority of “choppers” don’t look quite right; they are built from the outside-in. I want my machines to look like every part came from the same factory.

I am going to be documenting this project extensively from this point on. I hate to give away the surprise factor, but it is the only way to show the amount of work involved in a full scale custom motorcycle.


9 responses to “New 2013 EFAB Chopper Underway


    Love it Lock, the whole ethos. I do however want to know how you are finishing those tube ends, are you welding in flat bungs or going round? Ron.


    Oh and I forgot to say that Arlen was always a big fan of the 7/8 inch tube moly frame. Always wanted to build a frame around that material myself as sometimes when I look at modern frames they just look too heavy.

  • Trusty

    Like Ron Said! It’s all about the Ethos, it’s total craftsmanship, taken to it’s most logical end, not leaving any detail to another’s hands. Makes total sense.

    I think it’s completely incredible work/craftsmanship in its truest form, and I’m sure with you doing it, there will be a nice dose of great design in there too, which is always that last element that makes it really killer.

    Sick stuff man, can’t say enough !


  • Trusty

    Also forgot to mention that the NYC influence is definitely clear even in Icarus, its that distinctive shape, and “bulletproofness” if that makes sense? Larry knew his stuff, but this goes much further IMHO, taking those principals to a new place in actually engineering the bike completely.

  • Iliya

    Hey Lock, did you do any pre/post heating on chromoly?
    I’m making new frame now with .156 wall and they say if is .120 and thicker wall to do pre/post heating…
    As well you did so many cross members so probably your walls are thin, great work on that frame Sir…

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