A Cooler Spark Plug
Road Warrior
Joined: Jun 2009
Posts: 1,943
Likes: 3
From: NYC
I have new SE 10mm plug wires and have tried different plugs. When I switched from SE plugs back to stock 6R12's the bike runs great. I have checked wire resistance just for fun too.
I'm gonna keep it simple. My dealer has dyno'd my bike three time trying to figure out my performance issue. I decided to return to stock plugs because I had nothing else to lose.
Prior to the final dyno during my break-in she ran great. It was after the tuner recommended I switch to Screamin Eagle plugs that the problem started.
BTW, the basic stock plug is too hot for the my high compression motor...especially in Florida :-)
I'm gonna keep it simple. My dealer has dyno'd my bike three time trying to figure out my performance issue. I decided to return to stock plugs because I had nothing else to lose.
Prior to the final dyno during my break-in she ran great. It was after the tuner recommended I switch to Screamin Eagle plugs that the problem started.
BTW, the basic stock plug is too hot for the my high compression motor...especially in Florida :-)
the anti knock system is calibrated to stock plugs. hotter or colder plugs only effect anti fouling properties and do not change engine temps. as hot as these bikes run, you don't need hotter plugs to keep the spark plug tips clear.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
10R12s for VROD, 2 steps colder, been running them most of this season in a simple stage I 88" SG, but I can't say there is any improvement. Still noticed a little pinginging on the 100+F days. If compression is an issue tighten up the gap a little. I used the Autolites too, they work but the contact nipple isn't fixed like the HD plugs, it's the tread on type and it was loose everytime I checked it.
Novice
Joined: May 2010
Posts: 19
Likes: 1
From: Indiana
10R12s for VROD, 2 steps colder, been running them most of this season in a simple stage I 88" SG, but I can't say there is any improvement. Still noticed a little pinginging on the 100+F days. If compression is an issue tighten up the gap a little. I used the Autolites too, they work but the contact nipple isn't fixed like the HD plugs, it's the tread on type and it was loose everytime I checked it.
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
http://www.harley-performance.com/ha...park-plug.html
This should help....a lot of guys are running the cooler VRod plug. me, Im doing the NGK Irridium.
This should help....a lot of guys are running the cooler VRod plug. me, Im doing the NGK Irridium.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
Installed V-rod Plugs, Rode about 30 miles today gassin it, crusin it, even lugging it a little. No Pinging at all. 2011 Limited with K&N element in stock A/C Housing, V&H twin slash slip-ons. Had the Night-Rider "V-ieds" on since bike was new. The engine has always pinged after warm-up with ambient temps in the eighties regardless of the setting on the "V-ied" dials. When I checked the stock Spark Plugs the rear was a light gray, the front nearly pure white. If that ain't an indication of "LEAN" I'll kiss your ugly, er.... Dog! Why should I or anyone pay $25,000 for a new Bike, and then have to pay another $2000 to make it run right? Shitty deal!
Why does everyone what to change a good thing just stay with the stock plug.