differennce between hot spark plug and cold spark plug - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
Information Vault A place to post polls about members and their bikes as well as published information relevant to V-Stroms, for example, tech reports, dyno charts, brochures, articles etc.

LinkBack Thread Tools Display Modes
post #1 of 4 Old 11-17-2012, 10:48 PM Thread Starter
Join Date: Sep 2010
Location: Whitehall, OH. USA
Posts: 1,048
differennce between hot spark plug and cold spark plug

A spark plug is said to be "hot" if it is a better heat insulator, keeping more heat in the tip of the spark plug. A spark plug is said to be "cold" if it can conduct more heat out of the spark plug tip and lower the tip's temperature. http://www.ngksparkplugs.ca/tech-info-spark-plugs.cfm

Last edited by JRWalker; 11-25-2012 at 09:56 AM.
JRWalker is offline  
Sponsored Links
post #2 of 4 Old 11-18-2012, 01:20 PM
Jarlaxle28's Avatar
Join Date: Jul 2011
Location: Fairbanks, AK
Posts: 617
And the bonus question is... How can you tell when your existing plug is too hot or too cold??

[I]When you think of the long and gloomy history of man, you will find more hideous crimes have been committed in the name of obedience than have ever been committed in the name of rebellion.[/I]
- C. P. Snow
Jarlaxle28 is offline  
post #3 of 4 Old 11-18-2012, 01:34 PM
greywolf's Avatar
Join Date: Jan 2006
Location: Evanston IL USA
Posts: 38,049
In a liquid cooled bike, heat range isn't as big a deal as on an air cooled bike. Liquid does a much better job of removing heat from the combustion chamber, allowing a wider heat range on plugs. That being said, too hot a plug will erode electrodes too fast. In extreme cases, it can cause hot spot detonation or even pre-ignition. Too cold a plug will foul as it won't burn off deposits properly.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informa...-you-have.html
greywolf is offline  
post #4 of 4 Old 12-23-2012, 09:22 AM
Super Trooper!
Join Date: May 2010
Location: blue mountains
Posts: 1,322
Too hot a plug will show pitting on the ceramic central electrode and will be colored white-ish gray, too cold will burn sooty. The color to aim for is light tan/gray with the tip looking clean. Lots of color images available with a little searching. Look up NGK or Denso.

Saturn 5
saturn 5 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome