Building the NBO2
Richen circuit
In the Harley-Davidson O2 sensor wiring harness,
the Blue wire is the (+) or sensor signal wire. The Gray wire is the
(-) or ground wire. excess voltage into the gray wire. This also
keeps the divider circuit very small. It should be built as an
"inline" circuit.
The A resistor is a 2x ohm value , the B is 1x ohm
value making a
2/3 voltage divider. Sorry, the values are proprietary, but with a
little experimenting you can come up with some similar values.
The "package" should be put together
with barrel crimp connectors on the O2 sensor side. After putting it
together, it should be
placed in heat shrink tubing
to form a vibration resistant, weather tight package. The pigtails
can be butt jointed or used with quick disconnects. Adding a wire
sleeve around the package after installing it on the wiring harness
makes it a very neat, nearly invisible package.
This
device is covered by US Patent Law. Any commercial venture to
manufacture, sell or distribute this device without appropriate
licensing will be subject to legal action. We have no desire to
prevent individual riders from building their own DIY circuits. But
commercial ventures must obtain appropriate licensing.
