Resister help needed

I want to reduce the voltage from 1.5 volts to 1.0 - .90 volts.
What resister would do this and what end goes toward to 1.5 volt side?
Thanks

 

The voltage drop will tell an onboard motorcycle computer to richen the
fuel ratio a little more than stock. The signal comes from an O2 sensor
in the exhaust header pipes. I'm just trying to reduce the voltage a
little more than stock.

You can go here: http://www.nightrider.com/parts/
hd2007HD_nbo2_voltage_divide.htm and read the part about "Testing the
NBO2 Inline Enrichment Device off the bike".

 

Never mind, I found the schematic.