2. You say this product is easy to use, but fuel injection seems complicated
You are right; it is complicated but it is also easily adjusted. But we are just adjusting the factory's sophisticated fuel map within a simple, understandable range of settings. The same way carburetor engineers designed their products to have limited tuning areas that aftermarket jet kits took advantage of, we have stayed with that logic.

3. There are other aftermarket EFI tuning products on the market, why yours?
Any one of those products have the capability to deliver the correct air fuel mixture if set properly. Our product just has the ability to get you there more easily, quickly and efficiently. Most systems require complex spreadsheet mapping, designed to be constructed on a dyno with computers and exhaust gas analyzers. Also, our product is engine-load based, meaning we can tune for maximum performance without hurting your bike's fuel economy.

4. What about fuel economy?
Others claim it but we deliver. Our product independently tunes cruise fuel to allow you to optimize a leaner mixture when cruising; then when you twist the throttle, our acceleration fuel circuit comes into play and gives maximum drive and power. This acceleration fuel circuit is also very helpful in eliminating detonation or pinging.

5. I hear your product only adds fuel. Some claim you need to remove fuel?
The overall desire is to richen the bike for best power; to overcome both emissions leanness and leanness created by increased airflow of improved air filters and exhaust systems. If you look at every single location on a spreadsheet map of fuel, you might find a few isolated spots of richness. But our product is designed to tune separate ranges of fuel, just like a carburetor. Also that richness you see might well be acceleration fuel.

6. What if I change altitude? Will I need to readjust your product?
No, our product functions after the ECU has done all its calculations for temperature, altitude etc. So the settings you add for performance will stay with your bike at all times.

7. Is there anything else I should know?
The main problems we encounter are with bikes that have pre-existing EFI issues. Please be aware of any previous tuning attempts that may have been performed on your bike. Suzuki's ECU has the ability to be adjusted by aftermarket "flash" boxes. Our product requires the factory fuel map to operate properly. Also, pre-existing issues like misadjusted TPS sensors, dirty sparkplugs, reduced flow in exhaust systems, etc. must be solved first.

Questions on Closed-loop Technology:

8. What exactly is closed loop?
A closed-loop system consists of an additional oxygen sensor (or sensors) added to the fuel-injection system that monitors the air-fuel ratio (AFR) while the engine is at full operating temperature and in a steady state of operation. The information from the sensor(s) allows the ECU to tune accurately and stabilize the air fuel mixture to optimize emissions output from the engine.

9. How does it work?
An oxygen sensor has a metallic coating that reacts to contact with oxygen molecules in the exhaust stream. That reaction then alters a standard oscillating voltage signal sent to it by the ECU. These variations in peak voltages and speed of the oscillations tell the ECU whether the mixture is richer or leaner than the target air fuel mixture, and the ECU then reacts and adjusts based upon that signal. So, a standard oxygen sensor knows only rich or lean and the system cycles back and forth around that target. The underlying fuel-injection map needs to be reasonably close to the target AFR, so the closed loop stabilizes the output.

10. Why is all this necessary?
This system was designed back in the early 1980's to keep up with the constantly tougher emissions laws for automobiles. Engineers target an AFR of 14.7 to 1 as the perfect burn: This is where all hydrocarbons (fuel) and air convert to carbon dioxide and water vapor. Even today, combining this closed-loop approach with catalytic converters, is how auto manufacturers get their products to pass emissions. As motorcycle emissions regulations tighten, the same technology applies.

11. What's the good and bad of all this?
Well the good is that motorcycles have a well-defined technology that will keep them abreast of emissions laws. The down side is the lean mixtures that closed loop tunes to are fine in cars, but in motorcycles, light load rideability suffers, acceleration and throttle response suffer, and the leanness creates extra heat, especially in air-cooled motors. The narrow range where closed loop operates is where we spend most of our time riding.

12. Does this mean I can't tune my EFI anymore?
No, just the opposite. It is important to understand and to explain to customers that closed loop works in cruise ONLY. Exhaust pipe and high flow air cleaner changes will still lean out acceleration and higher rpms mixtures, just like before. The closed loop is NOT the magic pill.

13. How about 2007 Harleys, what's up?
First, the complete line (except Vrod) has been converted to closed loop. So understanding this technology is very important. Secondly, testing has shown that Harley has pushed even farther in the LEAN fuel area via the closed-loop approach. Last year's Dyna was tuned to 14.7, but all of this year's bikes seem to be tuned closer to 16.0 to 1. This explains early complaints of excessive heat and poor performance.

14. What about Fi2000?
We already offer 2007 units set specifically for these leaner mixtures. Our standard product requires that you disable the oxygen sensor and tune just like previous years. But we have also introduced a new technology which is closed loop control. That means we have developed a proprietary software interface to actually adjust the closed loop AFR.

15. So you now have two different Fi2000R's?
Yes, our standard Fi2000R with O2 eliminator plugs so you can tune in open loop, just like you always have, and our new closed loop control. It tunes our green pot automatically, just like the factory closed loop, but for cooler running, better rideability, and improved throttle response. Our yellow and red pots still tune the acceleration fuel and power fuel as before. Customers can now embrace the sophistication of closed loop control without the downside the Harley has built into it.