NOS for motorized bikes
How to fit a Nitrous Oxide kit to your motorized bike
NOS for Motorized Bicycles
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Nitrous Oxide Injection for Bicycle Engines
Nitrous Oxide Explained
The nozzle mounts on the air-box or air filter where it sprays a fine mist of nitrous that is then drawn into the engine through the carburetor. This allows the nitrous to be naturally aspirated into the cylinder instead of being forced, which is much friendlier to the motor and allows the nitrous to be used in a much wider range of throttle and rpm settings.
A side effect of nitrous injection is the cooling effect on the intake temperature. When released from the pressurized container, nitrous oxide temperature drops by around 130 degrees F, which can cool the intake charge by up to 75 degrees F. This provides a higher density gas mixture at the intake resulting in additional power.
The big advantage of nitrous is that it provides a short burst of power on demand at the touch of a button. Usually, the N2O system provides 2 to 3 seconds of increased power before the engine begins to miss-fire and NOS loses its efficiency. Otherwise, you don’t even notice it’s there.
What to expect in the NOS kit
Gas Bicycle Engine tuning
We all want to squeeze some more performance from our bicycle engines. See some quick, simple and cheap tuning options that will have your bicycle tearing up the road.
Benefits of Nitrous Oxide for 2 & 4 Stroke Engines
NOS kit contain:
Horsepower When You Need It
Designed to gain up to 20% in horsepower at full throttle, the NOS system is fantastic when talking those small hills that slow the engine down. The NOS system can also provide a significant increase in top speed. Note, however that the unbalanced crank of most bicycle motors can result in engine failure if revving too hard.
More Low End Torque
Torque gains are even greater as there is an increased combustion at a lower rpm range resulting in a significant improvement in acceleration.
Low Cost Performance
Easily Transferrable
Fuel Mileage and Drivability
Easy Installation
INSTALLATION INSTRUCTIONS
Connecting the NOS delivery line
There are two methods of connecting the Nitrous system:
a) Direct feed into the inlet manifold
b) Indirect feed into the air filter of the carburetor
NOS on 4 stroke bicycle engines
For 4-stroke bicycle engines, it is preferable to connect the N2O feed directly to inlet manifold. Feeding the Nitrous directly into the engine between the carburetor and the cylinder block will produce a greater burst of power. You should, however, be aware that connecting after the carburetor will weaken your fuel:air ratio.
NOS on 2 stroke bicycle engines
By contrast, it is NOT recommended that you connect a Nitrous line directly to the intake manifold of a two stroke bicycle engines.
Although this produces more power, a direct connection to the inlet manifold will “lean” the fuel ratio creating both hot running and reduce the amount of 2-stroke oil in the fuel mixture.
Inlet manifold with screw thread
This style of inlet manifold has threaded access. The threaded access is to assist with fitting Boost bottles or NOS systems. The dangers of fitting NOS systems at this point are explained in this article.
INSTALLATION INSTRUCTIONS
1. Connect the end of the NOS delivery line into the back of your air filter as shown:
It is not recommended to connect the Nitrous line directly to the intake manifold in two stroke engines. Although this produces more power, direct connection to the inlet manifold will “lean” the fuel ratio creating both hot running and reduce the amount of 2-stroke oil in the fuel mixture.
Speed Carburetor with NOS
The Nitrous Oxide supply tube is a perfect fit for the air holes in the back of the speed carburetor. A push fit should be sufficient but you can add a little glue to secure the tube if required
NT Carburetor with NOS
The Nitrous Oxide supply tube is a perfect fit for the air holes at the bottom of the NT carburetor. A push fit should be sufficient to secure the tube but you can add a little glue to the end of the tube if required
2. Fitting NOS Trigger
Cut section of handlebar grip
Cut a section off your left side handle bar twist grip to allow the NOS trigger to be positioned securely.
NT Carburetor with NOS
The left side handlebar grip should look like this. The cut in the grip will allow the NOS trigger to fit snugly against the handlebars.
3) Position the NOS trigger
Gas Bicycle Engine tuning
We all want to squeeze some more performance from our bicycle engines. See some quick, simple and cheap tuning options that will have your bicycle tearing up the road.
Using the NOS System
Fitting the NOS Cylinder
4) Insert a NOS canister into the trigger housing. Tighten the housing until the canister is ruptured. Around 30 seconds on N2O is now available when the trigger is pulled.
