Page 134 of High Performance Parts for American V-Twins 2008 by S&S Cycle

carbs fuel systems continued ­ s&s super e carb applications as a general rule we recommend a super e carb for engines up to about 100 cubic inches in displacement the super e s smaller 17/8 47.6mm bore size creates higher air velocity which results in better low and midrange response and power due to the super g s larger 21/16 52.3mm bore size it is recommended for engines of no less than 90 cubic inch displacement for the vast majority of engines in the 90-100 cubic inch displacement range we strongly recommend the super e because of the improved low and midrange response however if maximum peak horsepower is the most important consideration a super g carb would be appropriate while installing an s&s super e or g carburetor on a stock engine will result in more power the addition of a performance cam and exhaust system will result in even more power gains take a look at the s&s hot set up kits® in section 3 of this catalog for more information s&s® super e g shorty carburetors easy tuning ­ great performance the s&s shorty carbs are easy to tune due to the simple and functional design the super e g s are butterfly style carbs and have only two fuel circuits not counting the starting system or accelerator pump in addition idle mixture idle speed and accelerator pump adjustments are easily accessible when the carburetor is installed on a motorcycle the adjustable accelerator pump eliminates off idle hesitation and can be adjusted to provide the correct amount of fuel for a wide variety of engine displacements and styles the accelerator pump is also very useful as a starting aid to keep the carburetor bore unobstructed the s&s shorty carbs do not use a traditional choke plate for starting enrichment instead a separate adjustable enrichment circuit is used for cold starts which is also useful as an adjustable fast idle for cold engines in addition to the larger bore size another reason the shorty carbs are capable of making more power is the design of the air cleaner the most important factors are that the large surface area and the composition of the filter element present minimal restriction to the flow of air and almost as important is the elimination of turbulence at the inlet of the carburetor the filter area of the shorty carbs is maximized by an ingenious backplate design that wraps slightly around the carb to allow room for a wider filter element than a straight backplate would allow the pleated s&s filter element looks like paper but is actually a special resin impregnated cellulose fiber media that provides excellent filtration as well as superior flow the shape of the s&s air cleaner backplate and a directional cone inside the air cleaner cover also provides a smooth path for air to follow while traveling into the carburetor inlet this results in less turbulence and greater air flow notes stock motorcycles 1980 or earlier must be updated to a two cable pull open/pull closed throttle control system a single cable pull open system cannot pull the throttle closed in case the throttle should accidentally stick in the open position s&s offers high quality throttle cable kits in several lengths for this purpose a press on sleeve is also available to increase the diameter of the throttle grip area of 1972 and earlier handle bars to 1 to allow installation of modern throttle assemblies see page 5-69 to of this catalog s&s shorty carburetors will not fit harley-davidson® sportster® ironhead models with vertical magnetos due to clearance problems between the magneto and the carburetor shovelhead engines with five gallon gas tanks and cylinders that are taller than stock require a special notched air cleaner cover to clear the gas tank since these taller engines also require a special length manifold select a carb with a notched air cleaner cover without a manifold from the chart on page 5-19 and refer to page 5-57 to select the correct length manifold s&s does not recommend polishing or chrome plating super e g carburetors our repair department has seen many carbs with passages plugged with polishing compounds and some carbs that had been destroyed because the polishing or chrome plating had altered critical machined surfaces recommended for racing only ­ s&s super e g carburetors shown in this catalog section are not legal for use on motor vehicles operated on public highways in the state of california or in other states where similar pollution laws may apply the user shall determine the suitability of the product for his or her use and shall assume all risk and liability in connection therewith 5-17 visit us at www.sscycle.com

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