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Jets You Can Adjust, Running

As originally appeared in Hot Rod Bikes

The Cobra Fi2000R is simplicity personified and definitely lives up to its promise to eliminate annoying rideability issues associated with an improper air/fuel mixture.
 
     
 
An overwhelming feeling of dread comes over most of us when the subject of fuel injection and achieving the right air/fuel mixture after installing an aftermarket performance exhaust system comes up. As more and more factory fuel-injected bikes hit the streets, there are almost as many horror stories about some poor bastard that fried his motor because it leaned out after change the pipes and air intake. With these thoughts in mind, we have to admit that we shared the same fears every time we contemplated upgrading the exhaust system on our ’05 Road Glide. Two days before leaving for Sturgis ’04, we bought the Road Glide from Harley-Davidson of Westminster with the intentions of riding it there and back in its stock configuration. The ride to Sturgis was an excellent opportunity to break the Glide in and make future plans for soupin’ it up a little bit. Upon returning from Sturgis, we started exploring our options and chose a Cobra Fi2000R digital fuel processor as the basis of our Stage 1 conversion. We liked the fact Cobra Fi2000Rs can be fine tuned with a screwdriver with the motor running, Imagine being able to change the jets on your bike’s carburetor while it’s running, and you will get an idea how convenient Cobra’s digital fuel processor is. With this said, we think the feelings of gloom normally associated with addressing this subject should subside in most of you. We know that once we understood how easy the Fi2000R was to install and dial in, we were pretty excited. One of the problems plaguing the Road ‘Glide on the way to Sturgis was that it would occasionally stumble leaving a traffic light or in stop and go cruising it would let a big fart. We don’t know what the factory fix is for this lean condition, but we do know if a person wanted to cure this problem on a stock bike the Cobra Fi2000R would work perfect. But who would want to ride a stock bike when they could pickup some extra ponies and not compromise fuel mileage or reliability? With a fresh change of Syn3 and 4,500 miles on the clock, Jon Sprenger and Rick Botting strapped the Road Glide onto the Dyno and made a base run. Showroom-stock, our Road Glide produced 62 hp at the rear wheel. We were now ready to install all of the components comprising a Stage 1 kit. First on the list was to install at about $150, a Screamin’ Eagle Stage 1 high-performance air cleaner and backing plate. The second task was to install a pair of Cobra 4-inch slash-cut Dresser mufflers priced at under $400, and to tie it all in, a Cobra Fi2000R for under $240. Rick Botting installed the Fi2000R with the factory presets left intact. The first dyno run in this configuration produced around 68 hp. For our third and final test configuration, Rick Botting, using an Infrared Industries handheld HM 5000, adjusted the green, yellow, and red pots on the Cobra Fi2000R to achieve Stoich. This strange sounding expression is used to describe a 14.7 air/fuel ratio which is considered to be the optimum air/fuel ratio for all internal combustion engines. Cobra includes with the Fi2000R advanced tuning notes that explain which of the three colored pots can be adjusted to address rideability problems such as stuttering or blubbering simply by screwing them in or out. Oh yea, and on our third pull with Rick’s fine tuning complete, the Road Glide produced almost 70 hp at the rear wheels. Rick dismounted the Glide and didn’t even get a chance to shut it off before we hopped on and headed for the freeway. The bike felt like it climbed to 90 mph faster than before, and it definitely had more bark in its exhaust note. But more importantly when we purposely got stuck in stop and go traffic, it had lost its irritating hiccup problem. The Cobra Fi2000R is simplicity personified and definitely lives up to its promise to eliminate annoying rideability issues associated with an improper air/fuel mixture.