Article from Dave Leonard of Precision Cycle Works
Most of us have already installed a jet kit on our motorcycle with often little or no idea of how they work or why the carburetor manufacturers haven’t simply incorporated these rather simple improvements in the first place. Now, another product comes along making the whole thing even more confusing. It’s actually rather understandable, however, once you know how all this stuff works and how these products evolved.
First, lets briefly cover what the jet kit does. The motorcycle / carburetor manufacturers must comply with Federal emissions regulations and similar mandates around the world. The effect of all this regulation is a slight reduction in performance. The jet kit makers, however, are not subject to any of this and can focus their attention on getting the best fuel flow characteristics without regard for any outside authorities. Who knows what future government interventions may be applied, but for now, the jet kits provides a means to make an improvement, but there are some problems.
While the jet kit satisfies the fuel requirements, there is another product that addresses carburetor efficiency in a very different way. Its manufacturer discovered that the air jets were not particularly satisfactory in doing their job. The function of these is to better atomize (convert into a gaseous state) the fuel / air mixture rather than allow any portion of the fuel, being drawn up out of the float bowl, to simply sheet along the floor of the carburetor and trickle into the combustion chamber in a liquid state. These jets help to excite the fuel as it come up from the float bowls and better atomize the mixture as it enters the carburetor’s bore. The problem results from the less than an ideal situation at the jet inlets. The far larger quantities of air entering the carbs cause considerable disruption to the small amounts of air entering the air jets (just below the carb bores).
The Flo-Commander provides a set of fittings to replace or press over the main jets, a set of tubes to connect the new fittings to a central control valve to adjust the air volumes to the proper level, and all the necessary hardware to install. I’ve installed over one hundred of them and I’ve installed even more jet kits over the years. Jet kits are nice, and they nearly always make some improvement, however, the Flo-Commander, in most applications delivers a more noticeable correction.
All of the products I’ve seen from Performance Design are beautifully engineered with great attention to detail. The manufacturer obviously spent endless hours performing the necessary R&D and getting everything just right before going into production. Even the instructions are taken to a much higher level with top quality illustrations and in-depth step-by-step procedures.
Contact Performance Design at: EMAIL or call (334) 693-9203
After many years of installing jet kits my customers nearly always express some degree of satisfaction with statements such as “Yea, I think it’s a little better” or “The flat spot’s pretty much gone now”. Not bad, but nothing to get all excited about. With the Flo-Commander, however, it’s a very different thing. My customers typically remark something like “Wow, what a difference” or “It’s like a totally different motorcycle” or “The power delivery’s much better, but why is it so much smoother?”. I continue to install plenty of jet kits, but I prefer to begin with the Flo-Commander. I like happy customers, and that’s what this product is all about.
Dave Leonard firstname.lastname@example.org
Performance Design specializes in Suspension & Engine High Performance Parts and Tools. We offer state-of-the-art high speed hand tools for all of your Automotive & Motorcycle Needs. Contact Performance Design for all of your High Performance Parts needs.
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