Whats the spark gap and oil capacity for my stock

throw those champion plugs away THEY SUCK GET ---- NGK!

.035 gap

I have used Champion RN12YC since my Harley was new in 2000. They have been completely trustworthy. I check them every 5,000 miles to see how they look. I clean them if they are not burned and reuse them. I replace them at 10,000 no matter what they look like. I do keep an extra set in the saddle bags just in case one should have a failure, and who knows, someday a buddy might need one.

Gap those at .038, apply locktite anti seize to the threads, and torque to 15 lbs.


Ride safe, ride longer.

40 thousandths

Ultra classic spark plug gap 1998

The spark plug gap stays the same regardless of what you change other than the ignition system itself. Set your plug gap at 0.038"- 0.043". I usually set them to 0.035" to get a bit longer life out of them as long as the engine runs alright.

Good Luck
Steve