spark plugs
Thread Starter
|
Advanced
Joined: Sep 2012
Posts: 52
Likes: 1
From: mc rae ga 31055
spark plugs
i read in a bike magazine that if you rounded the tip of your spark plug and set it about 2 thousands wider gap it would run better. anybody tried this i was going to try it any suggestions
roller
roller
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
in general- the widest gap possible is better...but too wide and it'll not fire...
and our modern ignition systems look for a certain amount of resistance in the plugs and wires, otherwise the computer may think that a misfire is occurring and retard the timing...
resulting in reduced power and MPG.
or start throwing codes
highly tuned race motors and street motors are different animals
our street bike ignition systems are really really good, light years ahead of just 20 years ago.
unless you have specific needs and a way to measure results, you may do best to leave it
Mike
and our modern ignition systems look for a certain amount of resistance in the plugs and wires, otherwise the computer may think that a misfire is occurring and retard the timing...
resulting in reduced power and MPG.
or start throwing codes
highly tuned race motors and street motors are different animals
our street bike ignition systems are really really good, light years ahead of just 20 years ago.
unless you have specific needs and a way to measure results, you may do best to leave it
Mike
Ultimate HDF Member
Joined: Jul 2012
Posts: 5,282
Likes: 2
From: Northwestern Nevada
I've never heard of that, and while it might be a cool thing for YOU to try and report back to us on, I think I'll just leave my plugs set at recommended gaps and configuration.
In all seriousness, if you do try it, let us know what happens and whether you voided your warranty
In all seriousness, if you do try it, let us know what happens and whether you voided your warranty
Grand HDF Member
Joined: Jan 2012
Posts: 4,456
Likes: 2,858
From: Oklahoma
A "rounded" center electrode is one of the descriptions of a worn spark plug. While the manufacturers may be trying to sell more spark plugs, they continue their explanation by saying that crisp edges on both the center and side electrodes promote an easier, better spark and that worn, round surfaces require more voltage to fire. Many people believe they feel the engine running better with new spark plugs. Aside from some accumulation of combustion deposits, the only real difference between new and well used plugs is the erosion which has happened to both electrodes thus rounding them and widening the gap. If you wish to "pre-wear" your plugs before installing them, it is your call.
Outstanding HDF Member
Joined: Jan 2010
Posts: 2,916
Likes: 31
From: earth
I'm not talking about pre-eroding your spark plugs, it's basically trimming back the ground strap to help "unshroud" the spark.
Trending Topics
Road Captain
Joined: Dec 2009
Posts: 570
Likes: 4
From: New Mexico
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
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
Supporter
Joined: Aug 2008
Posts: 5,189
Likes: 16
From: N.E. Wisconsin
