Nitrous Express POWERSPORTS SYSTEMS WITH ELECTRIC INLINE FUEL PUMP 877-648-7687 - Manual (Page 7)

7
SECTION 5: TESTING THE SYSTEM
After all components have been assembled on the motorcycle and each piece has been verified that it is
installed properly, (call the factory tech line if you have any questions) it is time to test the system.
Reconnect the negative battery cable. Be sure the nitrous bottle is turned off and there is no pressure
in the supply line! Now arm the system by turning the toggle switch to the “ON” position. You should
hear the fuel pump come on. Blip the wide-open throttle switch , you should hear the solenoids “click”.
Be sure both solenoids are operating. (Do not operate the system for prolonged time period with the
engine off, fuel from the system will flood the engine.) Start the engine and let it warm to operating
temperature. Choose a safe place to test ride your bike; Always wear all appropriate safety equipment!
Switch the system to the “ON” position; DO NOT TURN ON THE NITROUS BOTTLE! Ride your bike
using wide-open throttle, engaging the nitrous system several times or until the motor loses power and
stumbles. This purges all air from the fuel circuit and insures it is working properly. If your nitrous
system fails to produce this over rich stumble, STOP and recheck every detail of your installation. Once
the problem has been located and corrected, rerun the procedure. Now it is time to turn on the bottle and
have some real fun!!! EXERCISE EXTREME CAUTION when using your Nitrous Express Nitrous
System; it is the most powerful system available anywhere!!! Using third gear at or above 3,000 RPM, go
to wide-open throttle, while system is armed. An instant power surge should let you know the system is
working. You are now ready for normal nitrous usage, have fun and be careful. No tuning is necessary, do
not change the factory recommended jetting patterns, if you have a problem contact the factory tech line.
TUNING TIPS
Nitrous oxide works well with all applications, 4 cycle, 2 cycle, diesel, and rotary engines. Each one has
individual tuning characteristics and these tips apply generally to each one. Nitrous oxide is referred to as
a “LIQUID SUPERCHARGER”. THE BIGGEST ENEMY OF ANY SUPERCHARGED ENGINE IS
DETONATION!!! Detonation can be caused by many things, lean fuel mixture, rich fuel mixtures,
inadequate octane fuel, too much ignition timing, not enough ignition timing, or lugging the engine, just
to mention a few!
1. Your vehicle engine should be tuned to its maximum power prior to nitrous use.
2. Your ignition system should be at its maximum. A stock ignition will be adequate on most street systems,
but for competition use, you must have the very best available ignition components.
3. The stock spark plug may be too hot for use with Nitrous, We have found for most applications the NGK
heat range # 9 is usually best. Do not use platinum tipped spark plugs, the spark kernel is to small for
nitrous usage and cannot ignite the mixture at the cylinder pressures that nitrous creates. Since
manufacturers specifications on the plugs vary from make and model, call the tech line to find the
right plug for your application.
4. If you are running more than a 35 horsepower boost NX recommends retarding the timing 2 degrees for
every 50 horsepower increment, i.e. if you jet your vehicle to 50 horsepower boost then timing should be
retarded by 2 degrees, 100 horsepower boost 4 degrees of retard and so on.
5. The NX system is so advanced that huge amounts of timing retard are not required. If adequate octane fuel
is used only small amount of timing retard may be needed. Be aware, Excessive timing retard in an internal
combustion engine causes increased cylinder temperatures, engine overheating, and over rich fuel
conditions.
6. The fuel system must be in top operating condition. Be sure the fuel filter is clean and there are no
restrictions in the fuel supply line.
7. The engine should be at operating temperature before nitrous is used.
8. Never “LUG” the engine while using nitrous! Use the system at wide-open throttle only! Never engage the
system below 3,000 RPM’s. IF you do any of the above, a dangerous “BACKFIRE” condition may result
in serious engine damage or physical injury.
9. Do not attempt to drill or alter the jets or serious engine damage will result. These items are
engineered to their maximum capability. Any modifications you can make will decrease power and hurt
engine parts.