Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
The way to check spark plugs for indications of engine tuning/wear is to run the engine under load, at temperature, not idling, kill it before it idles much at all, then pull the plugs.
I used to jet my BSA when I changed things by taking the jets and a spark plug wrench with me, running the engine under near full throttle for at least 20 seconds, pull the clutch in and kill the engine simultaneously, coast to the side of the street, pull and read the plugs, then jet up or down depending on the plug color.
Idling engines rarely distribute fuel evenly, or burn the same cylinder to cylinder due to compression differences etc.
Since the LT requires a bit more dismantling to get to the plugs, maybe you could go down the street from your home, come back with a pretty high throttle setting in 4th or 5th gear, pull the clutch/kill the engine and coast into your driveway for the check.
I don't want to achieve immortality through my work...I want to achieve it through not dying.
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.