if you knew what you were doing you could put a voltmeter on the o2 sensor.

.45 volts is stoich ( lower voltage is lean, higher voltage is rich)- corrected- typo left out the "4"


this is how i tune my carbed bikes and cars- even the panhead and the trail 90

mount an o2 sensor, and ride around with a voltmeter on my bars.

noting load and throttle positions as I go.

pocketful of screwdrivers helps too.


pt 2. I used to read plugs- it just doesn't offer any useful data this day and age with modern systems

to properly read a plug you would install new plugs, and run the motor at the rpm and load of interest, then kill the motor and coast to the shoulder and pull the plugs and read them.

install new plugs and repeat at same or new rpm range.

trying to gather info from a plug that has been used at idle, low speed, cruise and WOT is useless as the observer cannot determine under which conditions the plug deposits ( or lack of) occurred.






if you are worried, you can add nightrider.com XIEDS








Mike

 

The new 12mm O2 sensors on the 2010-up touring bikes aren't 0-1v out. It works with the 18mm versions, though.

 

Can you tell me more- I assumed like many cars the 4 wire was

Heater +

chassis ground

signal +

signal - ( often just grounded on a 3 wire system)


thanks, Mike

 

My experience says you are correct.

 

LOL...........good one!

 

That sounds nasty.

 

i dont know much about fuel injected but on a carb it will pop at the lower end.