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A 2005 Harley Davidson Sportster 883 Gets Quick - S&S Horsepower Upgrade Kit

S&S Makes Horsepower Easy
Ss Horsepower Upgrade Kit Ss Kit
01. The S&S Quick Setup Kit for '04-up Sportsters comes with everything you need to gain a quick 10-plus horsepower. Included are the S&S Performance mufflers (A), S&S backing plate (B), air-cleaner cover (C), air-filter element (D), breather vent hose (E), mounting hardware (F), and jet kit (not shown).

Ss Horsepower Upgrade Kit Dyno Chart
02. First things first. The 883ci Sporty was thrown up on the dyno to get some baseline numbers. The bike put out 35.10 hp and 38.37 lb-ft of torque, right where we expected it to be for a stock 883.
Ss Horsepower Upgrade Kit Air Cleaner
03. Once the bike was off the dyno and on a lift, the Lifestyle crew jumped into the process of removing the stock air cleaner. Here's a comparison shot of the stock air-cleaner assembly versus the S&S kit. Besides the trademark S&S clamshell air-cleaner cover being shiny enough to put you into a "chroma" (chrome-induced coma), the S&S air cleaner provides a larger, freer-flowing surface than the stock unit, and, as we all know, more air means more horsepower.
Ss Horsepower Upgrade Kit Carburetor Jet Kit
04. Since the new air cleaner allows for more airflow into the carb, S&S provides a CV carburertor jet kit. The kit for this application includes one needle jet, three main jets (180, 185, and 190), and two slow jets (48, 50). Once the stock backing plate was off, the float bowl was removed to gain access to the jets. The jetting instructions call for a 45 slow jet and NOKH needle jet. The instructions stated that a larger main jet may be necessary, so the Lifestyle crew swapped the stock 180 jet for the larger 185 main jet.
Ss Horsepower Upgrade Kit Head Breather Bolt
05. Next, the head breather-bolt assemblies were assembled per the instructions.
Ss Horsepower Upgrade Kit Backing Plate Brackets
06. Lifestyle Cycles made sure not to forget the backing-plate brackets when installing the breather-bolt assemblies...
Ss Horsepower Upgrade Kit Red Thread Locker
07. ...and then some red thread locker was applied to the bolts before they were screwed into the heads. Next, the rubber T was installed onto the breather bolts.
Ss Horsepower Upgrade Kit Gasket
08. Then, with a fresh gasket placed between the backside of the new S&S backing plate and the carb, the backing plate was bolted into position.
Ss Horsepower Upgrade Kit Steel Tube
09. The 1/2-inch steel tube that's included in the kit was then slid into the T on the breather-bolt hose. Then a short piece of rubber tubing that would fit into the notch on the backing plate was installed on the other end of the 1/2-inch steel tube.
Ss Horsepower Upgrade Kit Air Filter Element
10. Next, the S&S air-filter element was installed onto the backing plate...
Ss Horsepower Upgrade Kit Air Cleaner
11. ...and then the chromed S&S air-cleaner cover was bolted on. With the air-cleaner portion taken care of, it was time to move onto the mufflers.
Ss Horsepower Upgrade Kit Mufflers
12. Swapping mufflers was as simple as loosening the pipes at the heads as well as loosening clamps at the ends of the head pipes. Then the stock mufflers were slipped off, and the new S&S mufflers were bolted in place.
Ss Horsepower Upgrade Kit Mufflers
13. Here's a shot of the S&S performance mufflers (top) and the stock 883 mufflers. The S&S mufflers feature a larger tip, which will enhance the sound. They also feature internal baffles, which will help create the proper amount of backpressure, further enhancing performance. Also, the slash-cut tips look a lot cooler.
Ss Horsepower Upgrade Kit Dyno Chart
14. All that was left to do was to run the Sportster on the dyno one last time. After the install, the bike put out 48.27 hp and 44.74 lb-ft of torque. Just as S&S claimed, the bike gained more than 10 hp (13.17 hp, to be exact), a 37.52-percent increase. It's important to note that the bike peaked in horsepower at approximately 5,700 rpm, whereas during the stock run the bike peaked at about 5,100 rpm and was very jumpy as the rpm increased, with a very large dip in the 2,000-3,000-rpm range. So not only did it gain horsepower, but it now has a longer and smoother powerband.
Ss Horsepower Upgrade Kit Debbie Martin
15. Here's the happy owner (Debbie) with her hopped-up sporty. In less than an hour and for about $500, she was able to turn her timid baby into a speedy teenager looking for a race. After a few weeks of riding, Debbie wrote to us and said, "Thanks for turning me onto the S&S Quick Setup Kit. It really improved the performance and acceleration. It's like a huge breath of fresh air--what a smooth ride into each gear. And the sound is awesome. Now it sounds like the big boys."

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