Hotter Spark Plugs - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
 
LinkBack Thread Tools
post #1 of 10 (permalink) Old 02-15-2010, 06:20 PM Thread Starter
VR Member
 
Mikester1's Avatar
 
Join Date: Mar 2009
Location: Pearland, TX
Posts: 118
Thanks: 0
Thanked 2 Times in 2 Posts
Hotter Spark Plugs

So feeling happy with the clutch I decided to tackle the valves. Must say on an 08 C50T you got to remove the throttle body to get to the rear cylinder and a bunch of other stuff but this really has nothing to do with the topic so here is what I want to know, can I run the next plug down in number/ I.E. "hotter" and not hurt the bike? I have a power commander and have the bike dyno'd to run on the rich side at bottom for torque and lean out towards the top for fuel economy at highway speeds. Anyway the plugs are showing this by being a little on the black side. Electrode and ceramic look good, black around the base of the plug. Thanks ,Mikey.

Ride safe and see you on the flip side. You ever wondered why you wondered?
Mikester1 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 02-15-2010, 06:35 PM
Senior VR Member
 
Skrapiron's Avatar
 
Join Date: Jul 2008
Location: Second Star to the right, then straight on till morning.
Posts: 15,478
Thanks: 974
Thanked 2,070 Times in 1,393 Posts
Generally, hotter spark plugs are used in an engine that is running rich or uses oil. The hotter plug burns the contamination off and keeps the plugs from fouling.

Any soot around the base of the plug is just that. It does not indicate the running condition of the engine. What you should be concerned with is the condition of the electrode tip and the surrounding insulator.

A grayish tan to while color on the insulator and tip indicates the correct spark plug is in use, the fuel and ignition systems are in good shape and overall engine mechanical condition is good. Soft, black, sooty, dry-looking deposits on the tip and insulator indicate a rich air fuel mixture, weak ignition or wrong heat range spark plug (too cold). That is when you would consider changing to a hotter spark plug.

Current Bikes ---->
- 1969 Indian MX125 -10-2009 to Present
- 2008 Yamaha FZ6 - 11-2008 to Present
- 2006 Star Virago - 05-2011 to Present
- 2014 Honda CTX1300 - 05-2015 to Present

Past Bikes -------->

-1973 Yamaha RD350
-1991 Harley Sportster 883 XL
-2000 Yamaha XV125
-2003 Piaggio Fly
-2004 Suzuki LS650
-2005 Boulevard C50 - 07-2008 to 5-2012
-2012 Vulcan 900 05-2012-05-2015


Skrapiron is online now  
post #3 of 10 (permalink) Old 02-15-2010, 06:52 PM Thread Starter
VR Member
 
Mikester1's Avatar
 
Join Date: Mar 2009
Location: Pearland, TX
Posts: 118
Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by Skrapiron
Generally, hotter spark plugs are used in an engine that is running rich or uses oil. The hotter plug burns the contamination off and keeps the plugs from fouling.

Any soot around the base of the plug is just that. It does not indicate the running condition of the engine. What you should be concerned with is the condition of the electrode tip and the surrounding insulator.

A grayish tan to while color on the insulator and tip indicates the correct spark plug is in use, the fuel and ignition systems are in good shape and overall engine mechanical condition is good. Soft, black, sooty, dry-looking deposits on the tip and insulator indicate a rich air fuel mixture, weak ignition or wrong heat range spark plug (too cold). That is when you would consider changing to a hotter spark plug.
Well the second statement I would say matches my plug condition, so I am going to go to the next hotter plug. Thanks.

Ride safe and see you on the flip side. You ever wondered why you wondered?
Mikester1 is offline  
post #4 of 10 (permalink) Old 03-17-2010, 08:52 PM
VR Member
 
Join Date: Dec 2009
Posts: 77
Thanks: 0
Thanked 0 Times in 0 Posts
Is there anything wrong with running the plugs at there max gap 04 Vol.
bowers65 is offline  
post #5 of 10 (permalink) Old 03-17-2010, 09:02 PM
pug
VR Member
 
Join Date: Dec 2008
Location: Booneville,MS
Posts: 249
Thanks: 0
Thanked 0 Times in 0 Posts
plugs

I am in the same boat I also needing a hotter plug then. So I asked for a hotter plug at the parts store and they looked at me like I was crazy so could someone tell me the part number on the hotter plug that way I don't get the crazy look again.lol I am running a factory NKG plug now.
pug is offline  
post #6 of 10 (permalink) Old 03-17-2010, 11:46 PM
VR Member
 
Join Date: Jan 2010
Location: St. Louis, MO area
Posts: 223
Thanks: 3
Thanked 4 Times in 4 Posts
I read somewhere that an old Hot Rodder's trick was to grind back the outer electrode on a spark plug so that it is not completely covering the center electrode. Thus exposing more of the spark to the fuel/air mixture. Don't suppose anyone here has tried that on your scoot have you??

2006 C50

Of all the things I've loss I miss my mind the most
Kimo is offline  
post #7 of 10 (permalink) Old 03-18-2010, 08:17 AM
Senior VR Member
 
Join Date: Dec 2004
Location: Indiana, Lafayette
Posts: 12,585
Thanks: 12
Thanked 60 Times in 56 Posts
Regular C50 plug has a 7 in the stock number an 8 in the stock number would make it hotter.
Mort is offline  
post #8 of 10 (permalink) Old 03-18-2010, 08:29 AM
Senior VR Member
 
Skrapiron's Avatar
 
Join Date: Jul 2008
Location: Second Star to the right, then straight on till morning.
Posts: 15,478
Thanks: 974
Thanked 2,070 Times in 1,393 Posts
Quote:
Originally Posted by Kimo
I read somewhere that an old Hot Rodder's trick was to grind back the outer electrode on a spark plug so that it is not completely covering the center electrode. Thus exposing more of the spark to the fuel/air mixture. Don't suppose anyone here has tried that on your scoot have you??
Snake oil. That was the theory behind Split-Fire plugs. They made all sorts of claims about power, fuel economy and emissions. The reality is, a spark is a spark, is a spark. It doesn't matter the source or the location.

A 'hotter' plug does not create a 'hotter' spark. It means that the insulator holds more heat in the cylinder head, instead of conducting it out and cooling the cylinder head. It increases the operating temperature, which is helpful in burning off residual gasses of an over-rich air/fuel mix, or if there is significant oil blow-by. It won't create any more power, won't improve the fuel economy, but it may improve the emissions (specifically N02 - more complete combustion).

Current Bikes ---->
- 1969 Indian MX125 -10-2009 to Present
- 2008 Yamaha FZ6 - 11-2008 to Present
- 2006 Star Virago - 05-2011 to Present
- 2014 Honda CTX1300 - 05-2015 to Present

Past Bikes -------->

-1973 Yamaha RD350
-1991 Harley Sportster 883 XL
-2000 Yamaha XV125
-2003 Piaggio Fly
-2004 Suzuki LS650
-2005 Boulevard C50 - 07-2008 to 5-2012
-2012 Vulcan 900 05-2012-05-2015


Skrapiron is online now  
post #9 of 10 (permalink) Old 03-18-2010, 08:30 AM
pug
VR Member
 
Join Date: Dec 2008
Location: Booneville,MS
Posts: 249
Thanks: 0
Thanked 0 Times in 0 Posts
plug

Are you sure about this I looked at the ngk website and it looked like the lower the number the hotter the plug...
pug is offline  
post #10 of 10 (permalink) Old 03-18-2010, 09:41 AM
Senior VR Member
 
Join Date: Dec 2004
Location: Indiana, Lafayette
Posts: 12,585
Thanks: 12
Thanked 60 Times in 56 Posts
Re: plug

Quote:
Originally Posted by pug
Are you sure about this I looked at the ngk website and it looked like the lower the number the hotter the plug...
Maybe you're right. Check the manual, they discuss the two, 7 & 8 plugs. I have Nology wires so I use Nology Silverstone plugs. Not familiar with the NGK anymore.
Mort is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



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

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

Password:


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

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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